Subject: [PATCH v31 04/11] Add Incremental View Maintenance support to pg_dump

From: Yugo Nagata <[email-masked]>
Date: Wed, 11 Nov 2020 17:01:25 +0900

Support CREATE INCREMENTAL MATERIALIZED VIEW syntax.
---
 src/bin/pg_dump/pg_dump.c        | 18 +++++++++++++++---
 src/bin/pg_dump/pg_dump.h        |  2 ++
 src/bin/pg_dump/t/002_pg_dump.pl | 18 ++++++++++++++++++
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index b1c4c3ec7f..92a8cbf244 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -6677,6 +6677,7 @@ getTables(Archive *fout, int *numTables)
 	int			i_relacl;
 	int			i_acldefault;
 	int			i_ispartition;
+	int			i_isivm;
 
 	/*
 	 * Find all the tables and table-like objects.
@@ -6779,10 +6780,17 @@ getTables(Archive *fout, int *numTables)
 
 	if (fout->remoteVersion >= 100000)
 		appendPQExpBufferStr(query,
-							 "c.relispartition AS ispartition ");
+							 "c.relispartition AS ispartition, ");
 	else
 		appendPQExpBufferStr(query,
-							 "false AS ispartition ");
+							 "false AS ispartition, ");
+
+	if (fout->remoteVersion >= 170000)
+		appendPQExpBufferStr(query,
+							 "c.relisivm AS isivm ");
+	else
+		appendPQExpBufferStr(query,
+							 "false AS isivm ");
 
 	/*
 	 * Left join to pg_depend to pick up dependency info linking sequences to
@@ -6891,6 +6899,7 @@ getTables(Archive *fout, int *numTables)
 	i_relacl = PQfnumber(res, "relacl");
 	i_acldefault = PQfnumber(res, "acldefault");
 	i_ispartition = PQfnumber(res, "ispartition");
+	i_isivm = PQfnumber(res, "isivm");
 
 	if (dopt->lockWaitTimeout)
 	{
@@ -6970,6 +6979,7 @@ getTables(Archive *fout, int *numTables)
 			tblinfo[i].amname = pg_strdup(PQgetvalue(res, i, i_amname));
 		tblinfo[i].is_identity_sequence = (strcmp(PQgetvalue(res, i, i_is_identity_sequence), "t") == 0);
 		tblinfo[i].ispartition = (strcmp(PQgetvalue(res, i, i_ispartition), "t") == 0);
+		tblinfo[i].isivm = (strcmp(PQgetvalue(res, i, i_isivm), "t") == 0);
 
 		/* other fields were zeroed above */
 
@@ -16023,9 +16033,11 @@ dumpTableSchema(Archive *fout, const TableInfo *tbinfo)
 			binary_upgrade_set_pg_class_oids(fout, q,
 											 tbinfo->dobj.catId.oid, false);
 
-		appendPQExpBuffer(q, "CREATE %s%s %s",
+		appendPQExpBuffer(q, "CREATE %s%s%s %s",
 						  tbinfo->relpersistence == RELPERSISTENCE_UNLOGGED ?
 						  "UNLOGGED " : "",
+						  tbinfo->relkind == RELKIND_MATVIEW && tbinfo->isivm ?
+						  "INCREMENTAL " : "",
 						  reltypename,
 						  qualrelname);
 
diff --git a/src/bin/pg_dump/pg_dump.h b/src/bin/pg_dump/pg_dump.h
index 9bc93520b4..4e240f8832 100644
--- a/src/bin/pg_dump/pg_dump.h
+++ b/src/bin/pg_dump/pg_dump.h
@@ -325,6 +325,8 @@ typedef struct _tableInfo
 	int			numParents;		/* number of (immediate) parent tables */
 	struct _tableInfo **parents;	/* TableInfos of immediate parents */
 
+	bool		isivm;			/* is incrementally maintainable materialized view? */
+
 	/*
 	 * These fields are computed only if we decide the table is interesting
 	 * (it's either a table to dump, or a direct parent of a dumpable table).
diff --git a/src/bin/pg_dump/t/002_pg_dump.pl b/src/bin/pg_dump/t/002_pg_dump.pl
index f0410ce6a1..a119ec8db1 100644
--- a/src/bin/pg_dump/t/002_pg_dump.pl
+++ b/src/bin/pg_dump/t/002_pg_dump.pl
@@ -2832,6 +2832,24 @@ my %tests = (
 		},
 	},
 
+	'CREATE MATERIALIZED VIEW matview_ivm' => {
+		create_order => 21,
+		create_sql   => 'CREATE INCREMENTAL MATERIALIZED VIEW dump_test.matview_ivm (col1) AS
+					   SELECT col1 FROM dump_test.test_table;',
+		regexp => qr/^
+			\QCREATE INCREMENTAL MATERIALIZED VIEW dump_test.matview_ivm AS\E
+			\n\s+\QSELECT col1\E
+			\n\s+\QFROM dump_test.test_table\E
+			\n\s+\QWITH NO DATA;\E
+			/xm,
+		like =>
+		  { %full_runs, %dump_test_schema_runs, section_pre_data => 1, },
+		unlike => {
+			exclude_dump_test_schema => 1,
+			only_dump_measurement => 1,
+		},
+	},
+
 	'CREATE POLICY p1 ON test_table' => {
 		create_order => 22,
 		create_sql => 'CREATE POLICY p1 ON dump_test.test_table
-- 
2.25.1

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