agora inbox for [email protected]  

help / color / mirror / Atom feed

[PATCH v3 09/10] ci: windows: Disabling write cache flushing during test
581+ messages / 3 participants
[nested] [flat]

* [PATCH v3 09/10] ci: windows: Disabling write cache flushing during test
@ 2023-08-07 23:56 Andres Freund <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Andres Freund @ 2023-08-07 23:56 UTC (permalink / raw)

This has been measured to reduce windows test times by about 30s.
---
 .cirrus.tasks.yml                    |  6 ++++++
 src/tools/ci/windows_write_cache.ps1 | 20 ++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 src/tools/ci/windows_write_cache.ps1

diff --git a/.cirrus.tasks.yml b/.cirrus.tasks.yml
index d1730ce08a8..360b1c775fd 100644
--- a/.cirrus.tasks.yml
+++ b/.cirrus.tasks.yml
@@ -547,6 +547,12 @@ task:
   setup_additional_packages_script: |
     REM choco install -y --no-progress ...
 
+  # Define the write cache to be power protected. This reduces the rate of
+  # cache flushes, which seems to help metadata heavy workloads on NTFS. We're
+  # just testing here anyway, so ...
+  change_write_caching_script:
+    - powershell src/tools/ci/windows_write_cache.ps1 2>&1
+
   setup_hosts_file_script: |
     echo 127.0.0.1 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
     echo 127.0.0.2 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
diff --git a/src/tools/ci/windows_write_cache.ps1 b/src/tools/ci/windows_write_cache.ps1
new file mode 100644
index 00000000000..5c67b3ce54b
--- /dev/null
+++ b/src/tools/ci/windows_write_cache.ps1
@@ -0,0 +1,20 @@
+# Define the write cache to be power protected. This reduces the rate of cache
+# flushes, which seems to help metadata heavy workloads on NTFS. We're just
+# testing here anyway, so ...
+#
+# Let's do so for all disks, this could be useful beyond cirrus-ci.
+
+Set-Location "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI";
+
+Get-ChildItem -Path "*/*" | foreach-object {
+    Push-Location;
+    cd /$_;
+    pwd;
+    cd 'Device Parameters';
+    if (!(Test-Path -Path "Disk")) {
+	New-Item -Path "Disk";
+    }
+
+    Set-ItemProperty -Path Disk -Type DWord -name CacheIsPowerProtected -Value 1;
+    Pop-Location;
+}
-- 
2.38.0


--uh2yukyzfvojbe2k
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v3-0010-regress-Check-for-postgres-startup-completion-mor.patch"



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v1 6/9] ci: windows: Disabling write cache flushing during test
@ 2023-08-07 23:56 Andres Freund <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Andres Freund @ 2023-08-07 23:56 UTC (permalink / raw)

This has been measured to reduce windows test times by about 30s.
---
 .cirrus.yml                          | 2 ++
 src/tools/ci/windows_write_cache.ps1 | 3 +++
 2 files changed, 5 insertions(+)
 create mode 100644 src/tools/ci/windows_write_cache.ps1

diff --git a/.cirrus.yml b/.cirrus.yml
index 35ef9c97211..ef825485826 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -559,6 +559,8 @@ task:
   setup_additional_packages_script: |
     REM choco install -y --no-progress ...
 
+  change_write_caching_script: powershell src/tools/ci/windows_write_cache.ps1
+
   setup_hosts_file_script: |
     echo 127.0.0.1 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
     echo 127.0.0.2 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
diff --git a/src/tools/ci/windows_write_cache.ps1 b/src/tools/ci/windows_write_cache.ps1
new file mode 100644
index 00000000000..9c52bc886d4
--- /dev/null
+++ b/src/tools/ci/windows_write_cache.ps1
@@ -0,0 +1,3 @@
+Get-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected
+Set-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected -Value 0
+Get-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected
-- 
2.38.0


--uu4yojthqnm7ulmd
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0007-regress-Check-for-postgres-startup-completion-mor.patch"



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v1 6/9] ci: windows: Disabling write cache flushing during test
@ 2023-08-07 23:56 Andres Freund <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Andres Freund @ 2023-08-07 23:56 UTC (permalink / raw)

This has been measured to reduce windows test times by about 30s.
---
 .cirrus.yml                          | 2 ++
 src/tools/ci/windows_write_cache.ps1 | 3 +++
 2 files changed, 5 insertions(+)
 create mode 100644 src/tools/ci/windows_write_cache.ps1

diff --git a/.cirrus.yml b/.cirrus.yml
index 35ef9c97211..ef825485826 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -559,6 +559,8 @@ task:
   setup_additional_packages_script: |
     REM choco install -y --no-progress ...
 
+  change_write_caching_script: powershell src/tools/ci/windows_write_cache.ps1
+
   setup_hosts_file_script: |
     echo 127.0.0.1 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
     echo 127.0.0.2 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
diff --git a/src/tools/ci/windows_write_cache.ps1 b/src/tools/ci/windows_write_cache.ps1
new file mode 100644
index 00000000000..9c52bc886d4
--- /dev/null
+++ b/src/tools/ci/windows_write_cache.ps1
@@ -0,0 +1,3 @@
+Get-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected
+Set-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected -Value 0
+Get-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected
-- 
2.38.0


--uu4yojthqnm7ulmd
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0007-regress-Check-for-postgres-startup-completion-mor.patch"



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v3 09/10] ci: windows: Disabling write cache flushing during test
@ 2023-08-07 23:56 Andres Freund <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Andres Freund @ 2023-08-07 23:56 UTC (permalink / raw)

This has been measured to reduce windows test times by about 30s.
---
 .cirrus.tasks.yml                    |  6 ++++++
 src/tools/ci/windows_write_cache.ps1 | 20 ++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 src/tools/ci/windows_write_cache.ps1

diff --git a/.cirrus.tasks.yml b/.cirrus.tasks.yml
index d1730ce08a8..360b1c775fd 100644
--- a/.cirrus.tasks.yml
+++ b/.cirrus.tasks.yml
@@ -547,6 +547,12 @@ task:
   setup_additional_packages_script: |
     REM choco install -y --no-progress ...
 
+  # Define the write cache to be power protected. This reduces the rate of
+  # cache flushes, which seems to help metadata heavy workloads on NTFS. We're
+  # just testing here anyway, so ...
+  change_write_caching_script:
+    - powershell src/tools/ci/windows_write_cache.ps1 2>&1
+
   setup_hosts_file_script: |
     echo 127.0.0.1 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
     echo 127.0.0.2 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
diff --git a/src/tools/ci/windows_write_cache.ps1 b/src/tools/ci/windows_write_cache.ps1
new file mode 100644
index 00000000000..5c67b3ce54b
--- /dev/null
+++ b/src/tools/ci/windows_write_cache.ps1
@@ -0,0 +1,20 @@
+# Define the write cache to be power protected. This reduces the rate of cache
+# flushes, which seems to help metadata heavy workloads on NTFS. We're just
+# testing here anyway, so ...
+#
+# Let's do so for all disks, this could be useful beyond cirrus-ci.
+
+Set-Location "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI";
+
+Get-ChildItem -Path "*/*" | foreach-object {
+    Push-Location;
+    cd /$_;
+    pwd;
+    cd 'Device Parameters';
+    if (!(Test-Path -Path "Disk")) {
+	New-Item -Path "Disk";
+    }
+
+    Set-ItemProperty -Path Disk -Type DWord -name CacheIsPowerProtected -Value 1;
+    Pop-Location;
+}
-- 
2.38.0


--uh2yukyzfvojbe2k
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v3-0010-regress-Check-for-postgres-startup-completion-mor.patch"



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v1 6/9] ci: windows: Disabling write cache flushing during test
@ 2023-08-07 23:56 Andres Freund <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Andres Freund @ 2023-08-07 23:56 UTC (permalink / raw)

This has been measured to reduce windows test times by about 30s.
---
 .cirrus.yml                          | 2 ++
 src/tools/ci/windows_write_cache.ps1 | 3 +++
 2 files changed, 5 insertions(+)
 create mode 100644 src/tools/ci/windows_write_cache.ps1

diff --git a/.cirrus.yml b/.cirrus.yml
index 35ef9c97211..ef825485826 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -559,6 +559,8 @@ task:
   setup_additional_packages_script: |
     REM choco install -y --no-progress ...
 
+  change_write_caching_script: powershell src/tools/ci/windows_write_cache.ps1
+
   setup_hosts_file_script: |
     echo 127.0.0.1 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
     echo 127.0.0.2 pg-loadbalancetest >> c:\Windows\System32\Drivers\etc\hosts
diff --git a/src/tools/ci/windows_write_cache.ps1 b/src/tools/ci/windows_write_cache.ps1
new file mode 100644
index 00000000000..9c52bc886d4
--- /dev/null
+++ b/src/tools/ci/windows_write_cache.ps1
@@ -0,0 +1,3 @@
+Get-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected
+Set-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected -Value 0
+Get-ItemProperty -path "HKLM:/SYSTEM/CurrentControlSet/Enum/SCSI/*/*/Device Parameters/Disk" -name CacheIsPowerProtected
-- 
2.38.0


--uu4yojthqnm7ulmd
Content-Type: text/x-diff; charset=us-ascii
Content-Disposition: attachment;
	filename="v1-0007-regress-Check-for-postgres-startup-completion-mor.patch"



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v50 4/8] Fix a few problems in index build progress reporting.
@ 2026-03-27 15:50 Álvaro Herrera <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Álvaro Herrera @ 2026-03-27 15:50 UTC (permalink / raw)

First, index_build() should not update the progress when being driven by
REPACK, because the progress reporting infractructure cannot handle status of
two commands at the same time. So far, REPACK with the CONCURRENTLY option
neglected this problem altogether, but even the existing REPACK wasn't
consistent enough: even if the 'progress' variable in repack_index() was
false, it didn't pass the value to index_build().

Second, REPACK (CONCURRENTLY) should not set PROGRESS_REPACK_PHASE to
PROGRESS_REPACK_PHASE_FINAL_CLEANUP in rebuild_relation() because it calls
finish_heap_swap() anyway (via rebuild_relation_finish_concurrent()), which
does the same thing.
---
 src/backend/bootstrap/bootstrap.c |  2 +-
 src/backend/catalog/heap.c        |  3 ++-
 src/backend/catalog/index.c       | 22 ++++++++++++++++++----
 src/backend/catalog/toasting.c    |  3 ++-
 src/backend/commands/indexcmds.c  |  1 +
 src/include/catalog/index.h       |  4 +++-
 6 files changed, 27 insertions(+), 8 deletions(-)

diff --git a/src/backend/bootstrap/bootstrap.c b/src/backend/bootstrap/bootstrap.c
index 38ef683d4c7..60fb7051830 100644
--- a/src/backend/bootstrap/bootstrap.c
+++ b/src/backend/bootstrap/bootstrap.c
@@ -1183,7 +1183,7 @@ build_indices(void)
 		heap = table_open(ILHead->il_heap, NoLock);
 		ind = index_open(ILHead->il_ind, NoLock);
 
-		index_build(heap, ind, ILHead->il_info, false, false);
+		index_build(heap, ind, ILHead->il_info, false, false, false);
 
 		index_close(ind, NoLock);
 		table_close(heap, NoLock);
diff --git a/src/backend/catalog/heap.c b/src/backend/catalog/heap.c
index 5748aa9a1a9..ae6b7cda3dd 100644
--- a/src/backend/catalog/heap.c
+++ b/src/backend/catalog/heap.c
@@ -3570,7 +3570,8 @@ RelationTruncateIndexes(Relation heapRelation)
 
 		/* Initialize the index and rebuild */
 		/* Note: we do not need to re-establish pkey setting */
-		index_build(heapRelation, currentIndex, indexInfo, true, false);
+		index_build(heapRelation, currentIndex, indexInfo, true, false,
+					true);
 
 		/* We're done with this index */
 		index_close(currentIndex, NoLock);
diff --git a/src/backend/catalog/index.c b/src/backend/catalog/index.c
index e418d67e8e4..4b8ed2c7660 100644
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -715,6 +715,9 @@ UpdateIndexRelation(Oid indexoid,
  *			already exists.
  *		INDEX_CREATE_PARTITIONED:
  *			create a partitioned index (table must be partitioned)
+ *		INDEX_CREATE_REPORT_PROGRESS:
+ *			update the backend's progress information during index build.
+
  * constr_flags: flags passed to index_constraint_create
  *		(only if INDEX_CREATE_ADD_CONSTRAINT is set)
  * allow_system_table_mods: allow table to be a system catalog
@@ -760,6 +763,7 @@ index_create(Relation heapRelation,
 	bool		invalid = (flags & INDEX_CREATE_INVALID) != 0;
 	bool		concurrent = (flags & INDEX_CREATE_CONCURRENT) != 0;
 	bool		partitioned = (flags & INDEX_CREATE_PARTITIONED) != 0;
+	bool		progress = (flags & INDEX_CREATE_REPORT_PROGRESS) != 0;
 	char		relkind;
 	TransactionId relfrozenxid;
 	MultiXactId relminmxid;
@@ -1276,7 +1280,8 @@ index_create(Relation heapRelation,
 	}
 	else
 	{
-		index_build(heapRelation, indexRelation, indexInfo, false, true);
+		index_build(heapRelation, indexRelation, indexInfo, false, true,
+					progress);
 	}
 
 	/*
@@ -1448,6 +1453,12 @@ index_create_copy(Relation heapRelation, bool concurrently,
 		stattargets[i].isnull = isnull;
 	}
 
+	/*
+	 * Note: The current callers do not need INDEX_CREATE_REPORT_PROGRESS. If
+	 * 'concurrently' is true, there is no build at all. Otherwise the index
+	 * build is a sub-command of REPACK. The current infrastructure does not
+	 * allow two commands to report their progress at the same time.
+	 */
 	if (concurrently)
 		flags = INDEX_CREATE_SKIP_BUILD | INDEX_CREATE_CONCURRENT;
 
@@ -1538,7 +1549,7 @@ index_concurrently_build(Oid heapRelationId,
 	indexInfo->ii_BrokenHotChain = false;
 
 	/* Now build the index */
-	index_build(heapRel, indexRelation, indexInfo, false, true);
+	index_build(heapRel, indexRelation, indexInfo, false, true, true);
 
 	/* Roll back any GUC changes executed by index functions */
 	AtEOXact_GUC(false, save_nestlevel);
@@ -3009,6 +3020,7 @@ index_update_stats(Relation rel,
  *
  * isreindex indicates we are recreating a previously-existing index.
  * parallel indicates if parallelism may be useful.
+ * progress indicates if the backend should update its progress info.
  *
  * Note: before Postgres 8.2, the passed-in heap and index Relations
  * were automatically closed by this routine.  This is no longer the case.
@@ -3019,7 +3031,8 @@ index_build(Relation heapRelation,
 			Relation indexRelation,
 			IndexInfo *indexInfo,
 			bool isreindex,
-			bool parallel)
+			bool parallel,
+			bool progress)
 {
 	IndexBuildResult *stats;
 	Oid			save_userid;
@@ -3070,6 +3083,7 @@ index_build(Relation heapRelation,
 	RestrictSearchPath();
 
 	/* Set up initial progress report status */
+	if (progress)
 	{
 		const int	progress_index[] = {
 			PROGRESS_CREATEIDX_PHASE,
@@ -3827,7 +3841,7 @@ reindex_index(const ReindexStmt *stmt, Oid indexId,
 
 	/* Initialize the index and rebuild */
 	/* Note: we do not need to re-establish pkey setting */
-	index_build(heapRelation, iRel, indexInfo, true, true);
+	index_build(heapRelation, iRel, indexInfo, true, true, progress);
 
 	/* Re-allow use of target index */
 	ResetReindexProcessing();
diff --git a/src/backend/catalog/toasting.c b/src/backend/catalog/toasting.c
index 4aa52a4bd25..51b27a8c71c 100644
--- a/src/backend/catalog/toasting.c
+++ b/src/backend/catalog/toasting.c
@@ -332,7 +332,8 @@ create_toast_table(Relation rel, Oid toastOid, Oid toastIndexOid,
 				 BTREE_AM_OID,
 				 rel->rd_rel->reltablespace,
 				 collationIds, opclassIds, NULL, coloptions, NULL, (Datum) 0,
-				 INDEX_CREATE_IS_PRIMARY, 0, true, true, NULL);
+				 INDEX_CREATE_IS_PRIMARY | INDEX_CREATE_REPORT_PROGRESS, 0,
+				 true, true, NULL);
 
 	table_close(toast_rel, NoLock);
 
diff --git a/src/backend/commands/indexcmds.c b/src/backend/commands/indexcmds.c
index cba379810c7..932924c13e0 100644
--- a/src/backend/commands/indexcmds.c
+++ b/src/backend/commands/indexcmds.c
@@ -1231,6 +1231,7 @@ DefineIndex(ParseState *pstate,
 		flags |= INDEX_CREATE_PARTITIONED;
 	if (stmt->primary)
 		flags |= INDEX_CREATE_IS_PRIMARY;
+	flags |= INDEX_CREATE_REPORT_PROGRESS;
 
 	/*
 	 * If the table is partitioned, and recursion was declined but partitions
diff --git a/src/include/catalog/index.h b/src/include/catalog/index.h
index ed9e4c37d27..7ebe4f0bd87 100644
--- a/src/include/catalog/index.h
+++ b/src/include/catalog/index.h
@@ -71,6 +71,7 @@ extern void index_check_primary_key(Relation heapRel,
 #define	INDEX_CREATE_IF_NOT_EXISTS			(1 << 4)
 #define	INDEX_CREATE_PARTITIONED			(1 << 5)
 #define INDEX_CREATE_INVALID				(1 << 6)
+#define INDEX_CREATE_REPORT_PROGRESS		(1 << 7)
 
 extern Oid	index_create(Relation heapRelation,
 						 const char *indexRelationName,
@@ -148,7 +149,8 @@ extern void index_build(Relation heapRelation,
 						Relation indexRelation,
 						IndexInfo *indexInfo,
 						bool isreindex,
-						bool parallel);
+						bool parallel,
+						bool progress);
 
 extern void validate_index(Oid heapId, Oid indexId, Snapshot snapshot);
 
-- 
2.47.3


--brnevsqjnuzpyok4
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
	filename="v50-0005-support-repacking-tables-with-exclusion-constrai.patch"



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v3 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index d56dcc701ce..eed9aaeb7c1 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--6vzYk1swa63ey9i6
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v3-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v4 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index a0f7f8e2168..75c27a08540 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--2xrO7hiVfr8aWtYg
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v4-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v2 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index b01e74638c4..3fa6cdf3a5e 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index d56dcc701ce..eed9aaeb7c1 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--CT89ko5pLUrsvFtH
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v2 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index b01e74638c4..3fa6cdf3a5e 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index d56dcc701ce..eed9aaeb7c1 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--CT89ko5pLUrsvFtH
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v2 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index b01e74638c4..3fa6cdf3a5e 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index d56dcc701ce..eed9aaeb7c1 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--CT89ko5pLUrsvFtH
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v2-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v5 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  28 ---
 4 files changed, 20 insertions(+), 354 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index 0e0d53926af..774be23b4f9 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1717,7 +1705,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index c56437d6057..17ad8eeb838 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index b9653f0aefe..e68937c9934 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -785,17 +785,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -849,7 +843,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -860,27 +853,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--ZcI1PtyEAe3VcVeQ
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v5-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v3 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index d56dcc701ce..eed9aaeb7c1 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--6vzYk1swa63ey9i6
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v3-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v5 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  28 ---
 4 files changed, 20 insertions(+), 354 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index 0e0d53926af..774be23b4f9 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1717,7 +1705,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index c56437d6057..17ad8eeb838 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index b9653f0aefe..e68937c9934 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -785,17 +785,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -849,7 +843,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -860,27 +853,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--ZcI1PtyEAe3VcVeQ
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v5-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v4 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index a0f7f8e2168..75c27a08540 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--2xrO7hiVfr8aWtYg
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v4-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v6 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/connectdb.c   |   4 +-
 src/bin/pg_dump/pg_dump.c     | 334 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  28 ---
 5 files changed, 23 insertions(+), 359 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index 0e0d53926af..774be23b4f9 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1717,7 +1705,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/connectdb.c b/src/bin/pg_dump/connectdb.c
index f3ce8b1cfb1..d145308dccf 100644
--- a/src/bin/pg_dump/connectdb.c
+++ b/src/bin/pg_dump/connectdb.c
@@ -212,11 +212,11 @@ ConnectDatabase(const char *dbname, const char *connection_string,
 	my_version = PG_VERSION_NUM;
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dump.c.)
 	 */
 	if (my_version != server_version_temp
-		&& (server_version_temp < 90200 ||
+		&& (server_version_temp < 100000 ||
 			(server_version_temp / 100) > (my_version / 100)))
 	{
 		pg_log_error("aborting because of server version mismatch");
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index c56437d6057..65bd15ebfd2 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1942,13 +1933,11 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	addObjectDependency(dobj, ext->dobj.dumpId);
 
 	/*
-	 * In 9.6 and above, mark the member object to have any non-initial ACLs
+	 * Mark the member object to have any non-initial ACLs
 	 * dumped.  (Any initial ACLs will be removed later, using data from
 	 * pg_init_privs, so that we'll dump only the delta from the extension's
 	 * initial setup.)
 	 *
-	 * Prior to 9.6, we do not include any extension member components.
-	 *
 	 * In binary upgrades, we still dump all components of the members
 	 * individually, since the idea is to exactly reproduce the database
 	 * contents rather than replace the extension contents with something
@@ -1964,12 +1953,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1984,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2196,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2213,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3098,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3296,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3638,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4205,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4274,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4489,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4852,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5142,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6630,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6821,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6856,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6938,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6957,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7004,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7252,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7294,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7868,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8154,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8820,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9086,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9313,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10717,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10784,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10958,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11128,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11140,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11148,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13469,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14963,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15372,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15383,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16848,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16872,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19161,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19222,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19414,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index b9653f0aefe..e68937c9934 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -785,17 +785,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -849,7 +843,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -860,27 +853,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--aHl3HfeiUuO3zeNC
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v6-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v4 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index a0f7f8e2168..75c27a08540 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--2xrO7hiVfr8aWtYg
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v4-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v4 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index a0f7f8e2168..75c27a08540 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--2xrO7hiVfr8aWtYg
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v4-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v3 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index d56dcc701ce..eed9aaeb7c1 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--6vzYk1swa63ey9i6
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v3-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v5 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  28 ---
 4 files changed, 20 insertions(+), 354 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index 0e0d53926af..774be23b4f9 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1717,7 +1705,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index c56437d6057..17ad8eeb838 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index b9653f0aefe..e68937c9934 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -785,17 +785,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -849,7 +843,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -860,27 +853,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--ZcI1PtyEAe3VcVeQ
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v5-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v6 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/connectdb.c   |   4 +-
 src/bin/pg_dump/pg_dump.c     | 334 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  28 ---
 5 files changed, 23 insertions(+), 359 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index 0e0d53926af..774be23b4f9 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1717,7 +1705,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/connectdb.c b/src/bin/pg_dump/connectdb.c
index f3ce8b1cfb1..d145308dccf 100644
--- a/src/bin/pg_dump/connectdb.c
+++ b/src/bin/pg_dump/connectdb.c
@@ -212,11 +212,11 @@ ConnectDatabase(const char *dbname, const char *connection_string,
 	my_version = PG_VERSION_NUM;
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dump.c.)
 	 */
 	if (my_version != server_version_temp
-		&& (server_version_temp < 90200 ||
+		&& (server_version_temp < 100000 ||
 			(server_version_temp / 100) > (my_version / 100)))
 	{
 		pg_log_error("aborting because of server version mismatch");
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index c56437d6057..65bd15ebfd2 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1942,13 +1933,11 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	addObjectDependency(dobj, ext->dobj.dumpId);
 
 	/*
-	 * In 9.6 and above, mark the member object to have any non-initial ACLs
+	 * Mark the member object to have any non-initial ACLs
 	 * dumped.  (Any initial ACLs will be removed later, using data from
 	 * pg_init_privs, so that we'll dump only the delta from the extension's
 	 * initial setup.)
 	 *
-	 * Prior to 9.6, we do not include any extension member components.
-	 *
 	 * In binary upgrades, we still dump all components of the members
 	 * individually, since the idea is to exactly reproduce the database
 	 * contents rather than replace the extension contents with something
@@ -1964,12 +1953,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1984,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2196,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2213,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3098,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3296,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3638,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4205,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4274,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4489,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4852,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5142,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6630,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6821,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6856,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6938,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6957,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7004,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7252,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7294,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7868,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8154,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8820,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9086,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9313,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10717,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10784,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10958,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11128,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11140,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11148,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13469,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14963,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15372,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15383,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16848,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16872,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19161,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19222,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19414,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index b9653f0aefe..e68937c9934 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -785,17 +785,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -849,7 +843,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -860,27 +853,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--aHl3HfeiUuO3zeNC
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v6-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v4 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index a0f7f8e2168..75c27a08540 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--2xrO7hiVfr8aWtYg
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v4-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread

* [PATCH v4 1/4] pg_dump/pg_dumpall: bump minimum supported version to v10
@ 2026-04-17 17:15 Nathan Bossart <[email protected]>
  0 siblings, 0 replies; 581+ messages in thread

From: Nathan Bossart @ 2026-04-17 17:15 UTC (permalink / raw)

---
 doc/src/sgml/ref/pg_dump.sgml |  14 +-
 doc/src/sgml/runtime.sgml     |   2 +-
 src/bin/pg_dump/pg_dump.c     | 330 ++--------------------------------
 src/bin/pg_dump/pg_dumpall.c  |  32 +---
 4 files changed, 22 insertions(+), 356 deletions(-)

diff --git a/doc/src/sgml/ref/pg_dump.sgml b/doc/src/sgml/ref/pg_dump.sgml
index ae1bc14d2f2..64a3447e445 100644
--- a/doc/src/sgml/ref/pg_dump.sgml
+++ b/doc/src/sgml/ref/pg_dump.sgml
@@ -407,18 +407,6 @@ PostgreSQL documentation
         and there is no way to continue with the dump, so <application>pg_dump</application> has no choice
         but to abort the dump.
        </para>
-       <para>
-        To perform a parallel dump, the database server needs to support
-        synchronized snapshots, a feature that was introduced in
-        <productname>PostgreSQL</productname> 9.2 for primary servers and 10
-        for standbys. With this feature, database clients can ensure they see
-        the same data set even though they use different connections.
-        <command>pg_dump -j</command> uses multiple database connections; it
-        connects to the database once with the leader process and once again
-        for each worker job. Without the synchronized snapshot feature, the
-        different worker jobs wouldn't be guaranteed to see the same data in
-        each connection, which could lead to an inconsistent backup.
-       </para>
       </listitem>
      </varlistentry>
 
@@ -1718,7 +1706,7 @@ CREATE DATABASE foo WITH TEMPLATE template0;
    <productname>PostgreSQL</productname> server versions newer than
    <application>pg_dump</application>'s version.  <application>pg_dump</application> can also
    dump from <productname>PostgreSQL</productname> servers older than its own version.
-   (Currently, servers back to version 9.2 are supported.)
+   (Currently, servers back to version 10 are supported.)
    However, <application>pg_dump</application> cannot dump from
    <productname>PostgreSQL</productname> servers newer than its own major version;
    it will refuse to even try, rather than risk making an invalid dump.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index dfa292c2c3a..d9984910cc4 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1776,7 +1776,7 @@ $ <userinput>kill -INT `head -1 /usr/local/pgsql/data/postmaster.pid`</userinput
     version of
     <productname>PostgreSQL</productname>, to take advantage of enhancements
     that might have been made in these programs.  Current releases of the
-    dump programs can read data from any server version back to 9.2.
+    dump programs can read data from any server version back to 10.
    </para>
 
    <para>
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index a0f7f8e2168..75c27a08540 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -977,10 +977,10 @@ main(int argc, char **argv)
 
 
 	/*
-	 * We allow the server to be back to 9.2, and up to any minor release of
+	 * We allow the server to be back to 10, and up to any minor release of
 	 * our own major version.  (See also version check in pg_dumpall.c.)
 	 */
-	fout->minRemoteVersion = 90200;
+	fout->minRemoteVersion = 100000;
 	fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 
 	fout->numWorkers = numWorkers;
@@ -1491,9 +1491,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	 * Disable timeouts if supported.
 	 */
 	ExecuteSqlStatement(AH, "SET statement_timeout = 0");
-	if (AH->remoteVersion >= 90300)
 		ExecuteSqlStatement(AH, "SET lock_timeout = 0");
-	if (AH->remoteVersion >= 90600)
 		ExecuteSqlStatement(AH, "SET idle_in_transaction_session_timeout = 0");
 	if (AH->remoteVersion >= 170000)
 		ExecuteSqlStatement(AH, "SET transaction_timeout = 0");
@@ -1507,13 +1505,10 @@ setup_connection(Archive *AH, const char *dumpencoding,
 	/*
 	 * Adjust row-security mode, if supported.
 	 */
-	if (AH->remoteVersion >= 90500)
-	{
 		if (dopt->enable_row_security)
 			ExecuteSqlStatement(AH, "SET row_security = on");
 		else
 			ExecuteSqlStatement(AH, "SET row_security = off");
-	}
 
 	/*
 	 * For security reasons, we restrict the expansion of non-system views and
@@ -1568,11 +1563,7 @@ setup_connection(Archive *AH, const char *dumpencoding,
 		destroyPQExpBuffer(query);
 	}
 	else if (AH->numWorkers > 1)
-	{
-		if (AH->isStandby && AH->remoteVersion < 100000)
-			pg_fatal("parallel dumps from standby servers are not supported by this server version");
 		AH->sync_snapshot_id = get_synchronized_snapshot(AH);
-	}
 }
 
 /* Set up connection for a parallel worker process */
@@ -1964,12 +1955,7 @@ checkExtensionMembership(DumpableObject *dobj, Archive *fout)
 	if (fout->dopt->binary_upgrade)
 		dobj->dump = ext->dobj.dump;
 	else
-	{
-		if (fout->remoteVersion < 90600)
-			dobj->dump = DUMP_COMPONENT_NONE;
-		else
 			dobj->dump = ext->dobj.dump_contains & (DUMP_COMPONENT_ACL);
-	}
 
 	return true;
 }
@@ -2000,11 +1986,10 @@ selectDumpableNamespace(NamespaceInfo *nsinfo, Archive *fout)
 			simple_oid_list_member(&schema_include_oids,
 								   nsinfo->dobj.catId.oid) ?
 			DUMP_COMPONENT_ALL : DUMP_COMPONENT_NONE;
-	else if (fout->remoteVersion >= 90600 &&
-			 strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
+	else if (strcmp(nsinfo->dobj.name, "pg_catalog") == 0)
 	{
 		/*
-		 * In 9.6 and above, we dump out any ACLs defined in pg_catalog, if
+		 * We dump out any ACLs defined in pg_catalog, if
 		 * they are interesting (and not the original ACLs which were set at
 		 * initdb time, see pg_init_privs).
 		 */
@@ -2213,8 +2198,7 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 	else
 	{
 		if (plang->dobj.catId.oid <= g_last_builtin_oid)
-			plang->dobj.dump = fout->remoteVersion < 90600 ?
-				DUMP_COMPONENT_NONE : DUMP_COMPONENT_ACL;
+			plang->dobj.dump = DUMP_COMPONENT_ACL;
 		else
 			plang->dobj.dump = DUMP_COMPONENT_ALL;
 	}
@@ -2231,13 +2215,6 @@ selectDumpableProcLang(ProcLangInfo *plang, Archive *fout)
 static void
 selectDumpableAccessMethod(AccessMethodInfo *method, Archive *fout)
 {
-	/* see getAccessMethods() comment about v9.6. */
-	if (fout->remoteVersion < 90600)
-	{
-		method->dobj.dump = DUMP_COMPONENT_NONE;
-		return;
-	}
-
 	if (checkExtensionMembership(&method->dobj, fout))
 		return;					/* extension membership overrides all else */
 
@@ -3123,10 +3100,6 @@ buildMatViewRefreshDependencies(Archive *fout)
 				i_objid,
 				i_refobjid;
 
-	/* No Mat Views before 9.3. */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "WITH RECURSIVE w AS "
@@ -3325,10 +3298,7 @@ dumpDatabase(Archive *fout)
 						 "datcollate, datctype, datfrozenxid, "
 						 "datacl, acldefault('d', datdba) AS acldefault, "
 						 "datistemplate, datconnlimit, ");
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(dbQry, "datminmxid, ");
-	else
-		appendPQExpBufferStr(dbQry, "0 AS datminmxid, ");
 	if (fout->remoteVersion >= 170000)
 		appendPQExpBufferStr(dbQry, "datlocprovider, datlocale, datcollversion, ");
 	else if (fout->remoteVersion >= 150000)
@@ -3670,17 +3640,11 @@ dumpDatabase(Archive *fout)
 					ii_oid,
 					ii_relminmxid;
 
-		if (fout->remoteVersion >= 90300)
 			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, relminmxid, relfilenode, oid\n"
 							  "FROM pg_catalog.pg_class\n"
 							  "WHERE oid IN (%u, %u, %u, %u);\n",
 							  LargeObjectRelationId, LargeObjectLOidPNIndexId,
 							  LargeObjectMetadataRelationId, LargeObjectMetadataOidIndexId);
-		else
-			appendPQExpBuffer(loFrozenQry, "SELECT relfrozenxid, 0 AS relminmxid, relfilenode, oid\n"
-							  "FROM pg_catalog.pg_class\n"
-							  "WHERE oid IN (%u, %u);\n",
-							  LargeObjectRelationId, LargeObjectLOidPNIndexId);
 
 		lo_res = ExecuteSqlQuery(fout, loFrozenQry->data, PGRES_TUPLES_OK);
 
@@ -4243,10 +4207,6 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	/* No policies before 9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	/* Skip if --no-policies was specified */
 	if (dopt->no_policies)
 		return;
@@ -4316,10 +4276,7 @@ getPolicies(Archive *fout, TableInfo tblinfo[], int numTables)
 
 	printfPQExpBuffer(query,
 					  "SELECT pol.oid, pol.tableoid, pol.polrelid, pol.polname, pol.polcmd, ");
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query, "pol.polpermissive, ");
-	else
-		appendPQExpBufferStr(query, "'t' as polpermissive, ");
 	appendPQExpBuffer(query,
 					  "CASE WHEN pol.polroles = '{0}' THEN NULL ELSE "
 					  "   pg_catalog.array_to_string(ARRAY(SELECT pg_catalog.quote_ident(rolname) from pg_catalog.pg_roles WHERE oid = ANY(pol.polroles)), ', ') END AS polroles, "
@@ -4534,7 +4491,7 @@ getPublications(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -4897,7 +4854,7 @@ getPublicationTables(Archive *fout, TableInfo tblinfo[], int numTables)
 				j,
 				ntups;
 
-	if (dopt->no_publications || fout->remoteVersion < 100000)
+	if (dopt->no_publications)
 		return;
 
 	query = createPQExpBuffer();
@@ -5187,7 +5144,7 @@ getSubscriptions(Archive *fout)
 	int			i,
 				ntups;
 
-	if (dopt->no_subscriptions || fout->remoteVersion < 100000)
+	if (dopt->no_subscriptions)
 		return;
 
 	if (!is_superuser(fout))
@@ -6675,24 +6632,12 @@ getAccessMethods(Archive *fout)
 	query = createPQExpBuffer();
 
 	/*
-	 * Select all access methods from pg_am table.  v9.6 introduced CREATE
-	 * ACCESS METHOD, so earlier versions usually have only built-in access
-	 * methods.  v9.6 also changed the access method API, replacing dozens of
-	 * pg_am columns with amhandler.  Even if a user created an access method
-	 * by "INSERT INTO pg_am", we have no way to translate pre-v9.6 pg_am
-	 * columns to a v9.6+ CREATE ACCESS METHOD.  Hence, before v9.6, read
-	 * pg_am just to facilitate findAccessMethodByOid() providing the
-	 * OID-to-name mapping.
+	 * Select all access methods from pg_am table.
 	 */
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, amname, ");
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "amtype, "
 							 "amhandler::pg_catalog.regproc AS amhandler ");
-	else
-		appendPQExpBufferStr(query,
-							 "'i'::pg_catalog.\"char\" AS amtype, "
-							 "'-'::pg_catalog.regproc AS amhandler ");
 	appendPQExpBufferStr(query, "FROM pg_am");
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
@@ -6878,15 +6823,12 @@ getAggregates(Archive *fout)
 	int			i_proowner;
 	int			i_aggacl;
 	int			i_acldefault;
+	const char *agg_check;
 
 	/*
 	 * Find all interesting aggregates.  See comment in getFuncs() for the
 	 * rationale behind the filtering logic.
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *agg_check;
-
 		agg_check = (fout->remoteVersion >= 110000 ? "p.prokind = 'a'"
 					 : "p.proisagg");
 
@@ -6916,29 +6858,6 @@ getAggregates(Archive *fout)
 								 "refclassid = 'pg_extension'::regclass AND "
 								 "deptype = 'e')");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBufferStr(query, "SELECT tableoid, oid, proname AS aggname, "
-							 "pronamespace AS aggnamespace, "
-							 "pronargs, proargtypes, "
-							 "proowner, "
-							 "proacl AS aggacl, "
-							 "acldefault('f', proowner) AS acldefault "
-							 "FROM pg_proc p "
-							 "WHERE proisagg AND ("
-							 "pronamespace != "
-							 "(SELECT oid FROM pg_namespace "
-							 "WHERE nspname = 'pg_catalog')");
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 " OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7021,6 +6940,7 @@ getFuncs(Archive *fout)
 	int			i_prorettype;
 	int			i_proacl;
 	int			i_acldefault;
+	const char *not_agg_check;
 
 	/*
 	 * Find all interesting functions.  This is a bit complicated:
@@ -7039,14 +6959,10 @@ getFuncs(Archive *fout)
 	 * include them, since we want to dump extension members individually in
 	 * that mode.  Also, if they are used by casts or transforms then we need
 	 * to gather the information about them, though they won't be dumped if
-	 * they are built-in.  Also, in 9.6 and up, include functions in
+	 * they are built-in.  Also, include functions in
 	 * pg_catalog if they have an ACL different from what's shown in
 	 * pg_init_privs (so we have to join to pg_init_privs; annoying).
 	 */
-	if (fout->remoteVersion >= 90600)
-	{
-		const char *not_agg_check;
-
 		not_agg_check = (fout->remoteVersion >= 110000 ? "p.prokind <> 'a'"
 						 : "NOT p.proisagg");
 
@@ -7090,46 +7006,6 @@ getFuncs(Archive *fout)
 		appendPQExpBufferStr(query,
 							 "\n  OR p.proacl IS DISTINCT FROM pip.initprivs");
 		appendPQExpBufferChar(query, ')');
-	}
-	else
-	{
-		appendPQExpBuffer(query,
-						  "SELECT tableoid, oid, proname, prolang, "
-						  "pronargs, proargtypes, prorettype, proacl, "
-						  "acldefault('f', proowner) AS acldefault, "
-						  "pronamespace, "
-						  "proowner "
-						  "FROM pg_proc p "
-						  "WHERE NOT proisagg"
-						  "\n  AND NOT EXISTS (SELECT 1 FROM pg_depend "
-						  "WHERE classid = 'pg_proc'::regclass AND "
-						  "objid = p.oid AND deptype = 'i')"
-						  "\n  AND ("
-						  "\n  pronamespace != "
-						  "(SELECT oid FROM pg_namespace "
-						  "WHERE nspname = 'pg_catalog')"
-						  "\n  OR EXISTS (SELECT 1 FROM pg_cast"
-						  "\n  WHERE pg_cast.oid > '%u'::oid"
-						  "\n  AND p.oid = pg_cast.castfunc)",
-						  g_last_builtin_oid);
-
-		if (fout->remoteVersion >= 90500)
-			appendPQExpBuffer(query,
-							  "\n  OR EXISTS (SELECT 1 FROM pg_transform"
-							  "\n  WHERE pg_transform.oid > '%u'::oid"
-							  "\n  AND (p.oid = pg_transform.trffromsql"
-							  "\n  OR p.oid = pg_transform.trftosql))",
-							  g_last_builtin_oid);
-
-		if (dopt->binary_upgrade)
-			appendPQExpBufferStr(query,
-								 "\n  OR EXISTS(SELECT 1 FROM pg_depend WHERE "
-								 "classid = 'pg_proc'::regclass AND "
-								 "objid = p.oid AND "
-								 "refclassid = 'pg_extension'::regclass AND "
-								 "deptype = 'e')");
-		appendPQExpBufferChar(query, ')');
-	}
 
 	res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
 
@@ -7378,64 +7254,31 @@ getTables(Archive *fout, int *numTables)
 		appendPQExpBufferStr(query,
 							 "c.relhasoids, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relispopulated, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'t' as relispopulated, ");
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "c.relreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'d' AS relreplident, ");
 
-	if (fout->remoteVersion >= 90500)
 		appendPQExpBufferStr(query,
 							 "c.relrowsecurity, c.relforcerowsecurity, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS relrowsecurity, "
-							 "false AS relforcerowsecurity, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "c.relminmxid, tc.relminmxid AS tminmxid, ");
-	else
-		appendPQExpBufferStr(query,
-							 "0 AS relminmxid, 0 AS tminmxid, ");
 
-	if (fout->remoteVersion >= 90300)
 		appendPQExpBufferStr(query,
 							 "array_remove(array_remove(c.reloptions,'check_option=local'),'check_option=cascaded') AS reloptions, "
 							 "CASE WHEN 'check_option=local' = ANY (c.reloptions) THEN 'LOCAL'::text "
 							 "WHEN 'check_option=cascaded' = ANY (c.reloptions) THEN 'CASCADED'::text ELSE NULL END AS checkoption, ");
-	else
-		appendPQExpBufferStr(query,
-							 "c.reloptions, NULL AS checkoption, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "am.amname, ");
-	else
-		appendPQExpBufferStr(query,
-							 "NULL AS amname, ");
 
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "(d.deptype = 'i') IS TRUE AS is_identity_sequence, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS is_identity_sequence, ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "c.relispartition AS ispartition ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -7453,9 +7296,8 @@ getTables(Archive *fout, int *numTables)
 						 "LEFT JOIN pg_tablespace tsp ON (tsp.oid = c.reltablespace)\n");
 
 	/*
-	 * In 9.6 and up, left join to pg_am to pick up the amname.
+	 * Left join to pg_am to pick up the amname.
 	 */
-	if (fout->remoteVersion >= 90600)
 		appendPQExpBufferStr(query,
 							 "LEFT JOIN pg_am am ON (c.relam = am.oid)\n");
 
@@ -8028,12 +7870,8 @@ getIndexes(Archive *fout, TableInfo tblinfo[], int numTables)
 						 "t.reloptions AS indreloptions, ");
 
 
-	if (fout->remoteVersion >= 90400)
 		appendPQExpBufferStr(query,
 							 "i.indisreplident, ");
-	else
-		appendPQExpBufferStr(query,
-							 "false AS indisreplident, ");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(query,
@@ -8318,10 +8156,6 @@ getExtendedStatistics(Archive *fout)
 	int			i_stattarget;
 	int			i;
 
-	/* Extended statistics were new in v10 */
-	if (fout->remoteVersion < 100000)
-		return;
-
 	query = createPQExpBuffer();
 
 	if (fout->remoteVersion < 130000)
@@ -8988,10 +8822,6 @@ getEventTriggers(Archive *fout)
 				i_evtenabled;
 	int			ntups;
 
-	/* Before 9.3, there are no event triggers */
-	if (fout->remoteVersion < 90300)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query,
@@ -9258,10 +9088,6 @@ getTransforms(Archive *fout)
 	int			i_trffromsql;
 	int			i_trftosql;
 
-	/* Transforms didn't exist pre-9.5 */
-	if (fout->remoteVersion < 90500)
-		return;
-
 	query = createPQExpBuffer();
 
 	appendPQExpBufferStr(query, "SELECT tableoid, oid, "
@@ -9489,12 +9315,8 @@ getTableAttrs(Archive *fout, TableInfo *tblinfo, int numTables)
 		appendPQExpBufferStr(q,
 							 "'' AS attcompression,\n");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(q,
 							 "a.attidentity,\n");
-	else
-		appendPQExpBufferStr(q,
-							 "'' AS attidentity,\n");
 
 	if (fout->remoteVersion >= 110000)
 		appendPQExpBufferStr(q,
@@ -10897,8 +10719,6 @@ getAdditionalACLs(Archive *fout)
 	PQclear(res);
 
 	/* Fetch initial-privileges data */
-	if (fout->remoteVersion >= 90600)
-	{
 		printfPQExpBuffer(query,
 						  "SELECT objoid, classoid, objsubid, privtype, initprivs "
 						  "FROM pg_init_privs");
@@ -10966,7 +10786,6 @@ getAdditionalACLs(Archive *fout)
 			}
 		}
 		PQclear(res);
-	}
 
 	destroyPQExpBuffer(query);
 }
@@ -11141,15 +10960,6 @@ fetchAttributeStats(Archive *fout)
 	static bool restarted;
 	int			max_rels = MAX_ATTR_STATS_RELS;
 
-	/*
-	 * Our query for retrieving statistics for multiple relations uses WITH
-	 * ORDINALITY and multi-argument UNNEST(), both of which were introduced
-	 * in v9.4.  For older versions, we resort to gathering statistics for a
-	 * single relation at a time.
-	 */
-	if (fout->remoteVersion < 90400)
-		max_rels = 1;
-
 	/* If we're just starting, set our TOC pointer. */
 	if (!te)
 		te = AH->toc->next;
@@ -11320,16 +11130,11 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 		 * The results must be in the order of the relations supplied in the
 		 * parameters to ensure we remain in sync as we walk through the TOC.
 		 *
-		 * For v9.4 through v18, the redundant filter clause on s.tablename =
+		 * For versions before 19, the redundant filter clause on s.tablename =
 		 * ANY(...) seems sufficient to convince the planner to use
 		 * pg_class_relname_nsp_index, which avoids a full scan of pg_stats.
 		 * In newer versions, pg_stats returns the table OIDs, eliminating the
 		 * need for that hack.
-		 *
-		 * Our query for retrieving statistics for multiple relations uses
-		 * WITH ORDINALITY and multi-argument UNNEST(), both of which were
-		 * introduced in v9.4.  For older versions, we resort to gathering
-		 * statistics for a single relation at a time.
 		 */
 		if (fout->remoteVersion >= 190000)
 			appendPQExpBufferStr(query,
@@ -11337,7 +11142,7 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "JOIN unnest($1) WITH ORDINALITY AS u (tableid, ord) "
 								 "ON s.tableid = u.tableid "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else if (fout->remoteVersion >= 90400)
+		else
 			appendPQExpBufferStr(query,
 								 "FROM pg_catalog.pg_stats s "
 								 "JOIN unnest($1, $2) WITH ORDINALITY AS u (schemaname, tablename, ord) "
@@ -11345,12 +11150,6 @@ dumpRelationStats_dumper(Archive *fout, const void *userArg, const TocEntry *te)
 								 "AND s.tablename = u.tablename "
 								 "WHERE s.tablename = ANY($2) "
 								 "ORDER BY u.ord, s.attname, s.inherited");
-		else
-			appendPQExpBufferStr(query,
-								 "FROM pg_catalog.pg_stats s "
-								 "WHERE s.schemaname = $1[1] "
-								 "AND s.tablename = $2[1] "
-								 "ORDER BY s.attname, s.inherited");
 
 		ExecuteSqlStatement(fout, query->data);
 
@@ -13672,19 +13471,11 @@ dumpFunc(Archive *fout, const FuncInfo *finfo)
 							 "pg_catalog.pg_get_function_result(p.oid) AS funcresult,\n"
 							 "proleakproof,\n");
 
-		if (fout->remoteVersion >= 90500)
 			appendPQExpBufferStr(query,
 								 "array_to_string(protrftypes, ' ') AS protrftypes,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "NULL AS protrftypes,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -15174,14 +14965,9 @@ dumpCollation(Archive *fout, const CollInfo *collinfo)
 	/* Get collation-specific details */
 	appendPQExpBufferStr(query, "SELECT ");
 
-	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
 							 "collprovider, "
 							 "collversion, ");
-	else
-		appendPQExpBufferStr(query,
-							 "'c' AS collprovider, "
-							 "NULL AS collversion, ");
 
 	if (fout->remoteVersion >= 120000)
 		appendPQExpBufferStr(query,
@@ -15588,7 +15374,6 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 							 "pg_catalog.pg_get_function_arguments(p.oid) AS funcargs,\n"
 							 "pg_catalog.pg_get_function_identity_arguments(p.oid) AS funciargs,\n");
 
-		if (fout->remoteVersion >= 90400)
 			appendPQExpBufferStr(query,
 								 "aggkind,\n"
 								 "aggmtransfn,\n"
@@ -15600,31 +15385,12 @@ dumpAgg(Archive *fout, const AggInfo *agginfo)
 								 "aggtransspace,\n"
 								 "aggmtransspace,\n"
 								 "aggminitval,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'n' AS aggkind,\n"
-								 "'-' AS aggmtransfn,\n"
-								 "'-' AS aggminvtransfn,\n"
-								 "'-' AS aggmfinalfn,\n"
-								 "0 AS aggmtranstype,\n"
-								 "false AS aggfinalextra,\n"
-								 "false AS aggmfinalextra,\n"
-								 "0 AS aggtransspace,\n"
-								 "0 AS aggmtransspace,\n"
-								 "NULL AS aggminitval,\n");
 
-		if (fout->remoteVersion >= 90600)
 			appendPQExpBufferStr(query,
 								 "aggcombinefn,\n"
 								 "aggserialfn,\n"
 								 "aggdeserialfn,\n"
 								 "proparallel,\n");
-		else
-			appendPQExpBufferStr(query,
-								 "'-' AS aggcombinefn,\n"
-								 "'-' AS aggserialfn,\n"
-								 "'-' AS aggdeserialfn,\n"
-								 "'u' AS proparallel,\n");
 
 		if (fout->remoteVersion >= 110000)
 			appendPQExpBufferStr(query,
@@ -17084,8 +16850,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 			appendPQExpBufferStr(query,
 								 "PREPARE getColumnACLs(pg_catalog.oid) AS\n");
 
-			if (fout->remoteVersion >= 90600)
-			{
 				/*
 				 * In principle we should call acldefault('c', relowner) to
 				 * get the default ACL for a column.  However, we don't
@@ -17110,17 +16874,6 @@ dumpTable(Archive *fout, const TableInfo *tbinfo)
 									 "NOT at.attisdropped "
 									 "AND (at.attacl IS NOT NULL OR pip.initprivs IS NOT NULL) "
 									 "ORDER BY at.attnum");
-			}
-			else
-			{
-				appendPQExpBufferStr(query,
-									 "SELECT attname, attacl, '{}' AS acldefault, "
-									 "NULL AS privtype, NULL AS initprivs "
-									 "FROM pg_catalog.pg_attribute "
-									 "WHERE attrelid = $1 AND NOT attisdropped "
-									 "AND attacl IS NOT NULL "
-									 "ORDER BY attnum");
-			}
 
 			ExecuteSqlStatement(fout, query->data);
 
@@ -19410,16 +19163,10 @@ collectSequences(Archive *fout)
 	const char *query;
 
 	/*
-	 * Before Postgres 10, sequence metadata is in the sequence itself.  With
-	 * some extra effort, we might be able to use the sorted table for those
-	 * versions, but for now it seems unlikely to be worth it.
-	 *
 	 * Since version 18, we can gather the sequence data in this query with
 	 * pg_get_sequence_data(), but we only do so for non-schema-only dumps.
 	 */
-	if (fout->remoteVersion < 100000)
-		return;
-	else if (fout->remoteVersion < 180000 ||
+	if (fout->remoteVersion < 180000 ||
 			 (!fout->dopt->dumpData && !fout->dopt->sequence_data))
 		query = "SELECT seqrelid, format_type(seqtypid, NULL), "
 			"seqstart, seqincrement, "
@@ -19477,59 +19224,20 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 	PQExpBuffer delqry = createPQExpBuffer();
 	char	   *qseqname;
 	TableInfo  *owning_tab = NULL;
+	SequenceItem key = {0};
 
 	qseqname = pg_strdup(fmtId(tbinfo->dobj.name));
 
 	/*
-	 * For versions >= 10, the sequence information is gathered in a sorted
+	 * The sequence information is gathered in a sorted
 	 * table before any calls to dumpSequence().  See collectSequences() for
 	 * more information.
 	 */
-	if (fout->remoteVersion >= 100000)
-	{
-		SequenceItem key = {0};
-
 		Assert(sequences);
 
 		key.oid = tbinfo->dobj.catId.oid;
 		seq = bsearch(&key, sequences, nsequences,
 					  sizeof(SequenceItem), SequenceItemCmp);
-	}
-	else
-	{
-		PGresult   *res;
-
-		/*
-		 * Before PostgreSQL 10, sequence metadata is in the sequence itself.
-		 *
-		 * Note: it might seem that 'bigint' potentially needs to be
-		 * schema-qualified, but actually that's a keyword.
-		 */
-		appendPQExpBuffer(query,
-						  "SELECT 'bigint' AS sequence_type, "
-						  "start_value, increment_by, max_value, min_value, "
-						  "cache_value, is_cycled FROM %s",
-						  fmtQualifiedDumpable(tbinfo));
-
-		res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
-
-		if (PQntuples(res) != 1)
-			pg_fatal(ngettext("query to get data of sequence \"%s\" returned %d row (expected 1)",
-							  "query to get data of sequence \"%s\" returned %d rows (expected 1)",
-							  PQntuples(res)),
-					 tbinfo->dobj.name, PQntuples(res));
-
-		seq = pg_malloc0_object(SequenceItem);
-		seq->seqtype = parse_sequence_type(PQgetvalue(res, 0, 0));
-		seq->startv = strtoi64(PQgetvalue(res, 0, 1), NULL, 10);
-		seq->incby = strtoi64(PQgetvalue(res, 0, 2), NULL, 10);
-		seq->maxv = strtoi64(PQgetvalue(res, 0, 3), NULL, 10);
-		seq->minv = strtoi64(PQgetvalue(res, 0, 4), NULL, 10);
-		seq->cache = strtoi64(PQgetvalue(res, 0, 5), NULL, 10);
-		seq->cycled = (strcmp(PQgetvalue(res, 0, 6), "t") == 0);
-
-		PQclear(res);
-	}
 
 	/* Calculate default limits for a sequence of this type */
 	is_ascending = (seq->incby >= 0);
@@ -19708,8 +19416,6 @@ dumpSequence(Archive *fout, const TableInfo *tbinfo)
 					 tbinfo->dobj.namespace->dobj.name, tbinfo->rolname,
 					 tbinfo->dobj.catId, 0, tbinfo->dobj.dumpId);
 
-	if (fout->remoteVersion < 100000)
-		pg_free(seq);
 	destroyPQExpBuffer(query);
 	destroyPQExpBuffer(delqry);
 	free(qseqname);
diff --git a/src/bin/pg_dump/pg_dumpall.c b/src/bin/pg_dump/pg_dumpall.c
index c1f43113c53..5b10f7122b7 100644
--- a/src/bin/pg_dump/pg_dumpall.c
+++ b/src/bin/pg_dump/pg_dumpall.c
@@ -693,11 +693,11 @@ main(int argc, char *argv[])
 		fout->verbose = verbose;
 
 		/*
-		 * We allow the server to be back to 9.2, and up to any minor release
+		 * We allow the server to be back to 10, and up to any minor release
 		 * of our own major version.  (See also version check in
 		 * pg_dumpall.c.)
 		 */
-		fout->minRemoteVersion = 90200;
+		fout->minRemoteVersion = 100000;
 		fout->maxRemoteVersion = (PG_VERSION_NUM / 100) * 100 + 99;
 		fout->numWorkers = 1;
 
@@ -954,17 +954,11 @@ dropRoles(PGconn *conn)
 	int			i_rolname;
 	int			i;
 
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT rolname "
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 1", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT rolname "
-						  "FROM %s "
-						  "ORDER BY 1", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
@@ -1041,7 +1035,6 @@ dumpRoles(PGconn *conn)
 	 * Notes: rolconfig is dumped later, and pg_authid must be used for
 	 * extracting rolcomment regardless of role_catalog.
 	 */
-	if (server_version >= 90600)
 		printfPQExpBuffer(buf,
 						  "SELECT oid, rolname, rolsuper, rolinherit, "
 						  "rolcreaterole, rolcreatedb, "
@@ -1052,27 +1045,6 @@ dumpRoles(PGconn *conn)
 						  "FROM %s "
 						  "WHERE rolname !~ '^pg_' "
 						  "ORDER BY 2", role_catalog);
-	else if (server_version >= 90500)
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
-	else
-		printfPQExpBuffer(buf,
-						  "SELECT oid, rolname, rolsuper, rolinherit, "
-						  "rolcreaterole, rolcreatedb, "
-						  "rolcanlogin, rolconnlimit, rolpassword, "
-						  "rolvaliduntil, rolreplication, "
-						  "false as rolbypassrls, "
-						  "pg_catalog.shobj_description(oid, 'pg_authid') as rolcomment, "
-						  "rolname = current_user AS is_current_user "
-						  "FROM %s "
-						  "ORDER BY 2", role_catalog);
 
 	res = executeQuery(conn, buf->data);
 
-- 
2.50.1 (Apple Git-155)


--2xrO7hiVfr8aWtYg
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
	filename=v4-0002-pg_upgrade-bump-minimum-supported-version-to-v10.patch



^ permalink  raw  reply  [nested|flat] 581+ messages in thread