Feedback-ID: ia2694551:Fastmail
Date: Wed, 22 Apr 2026 11:30:26 +0200
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Antonin Houska <ah@cybertec.at>, Justin Pryzby <pryzby@telsasoft.com>,
	Mihail Nikalayeu <mihailnikalayeu@gmail.com>,
 Andres Freund <andres@anarazel.de>,
	Amit Kapila <amit.kapila16@gmail.com>,
 Srinath Reddy Sadipiralla <srinath2133@gmail.com>,
	Matthias van de Meent <boekewurm+postgres@gmail.com>,
 pgsql-hackers@lists.postgresql.org,
	Robert Treat <rob@xzilla.net>
Subject: Re: Adding REPACK [concurrently]
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On 2026-Apr-20, Alvaro Herrera wrote:

> There's also contrib/test_decoding.  It's somewhat vaguely adjacent, and
> the tests aren't _really_ about the decoding part, but of all these
> options, it seems the least bad one.

Here's a patch that does this.

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/

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From a64043f31950efa5f63274d6a3e498082ad2b064 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=81lvaro=20Herrera?= <alvherre@kurilemu.de>
Date: Wed, 22 Apr 2026 11:22:50 +0200
Subject: [PATCH] Move REPACK (CONCURRENTLY) test out of stock regression tests

These tests sometimes run with wal_level=minimal, which does not allow
to run REPACK (CONCURRENTLY).  Move them to test_decoding, which is
ensured to run with high enough wal_level.

Discussion: https://postgr.es/m/260901.1776696126@sss.pgh.pa.us
---
 contrib/test_decoding/Makefile            |  2 +-
 contrib/test_decoding/expected/repack.out | 30 +++++++++++++++++++++++
 contrib/test_decoding/meson.build         |  1 +
 contrib/test_decoding/sql/repack.sql      | 25 +++++++++++++++++++
 src/test/regress/expected/cluster.out     | 29 +++-------------------
 src/test/regress/sql/cluster.sql          | 13 +++-------
 6 files changed, 65 insertions(+), 35 deletions(-)
 create mode 100644 contrib/test_decoding/expected/repack.out
 create mode 100644 contrib/test_decoding/sql/repack.sql

diff --git a/contrib/test_decoding/Makefile b/contrib/test_decoding/Makefile
index acbcaed2feb..0111124399a 100644
--- a/contrib/test_decoding/Makefile
+++ b/contrib/test_decoding/Makefile
@@ -5,7 +5,7 @@ PGFILEDESC = "test_decoding - example of a logical decoding output plugin"
 
 REGRESS = ddl xact rewrite toast permissions decoding_in_xact \
 	decoding_into_rel binary prepared replorigin time messages \
-	spill slot truncate stream stats twophase twophase_stream
+	repack spill slot truncate stream stats twophase twophase_stream
 ISOLATION = mxact delayed_startup ondisk_startup concurrent_ddl_dml \
 	oldest_xmin snapshot_transfer subxact_without_top concurrent_stream \
 	twophase_snapshot slot_creation_error catalog_change_snapshot \
diff --git a/contrib/test_decoding/expected/repack.out b/contrib/test_decoding/expected/repack.out
new file mode 100644
index 00000000000..70039d824af
--- /dev/null
+++ b/contrib/test_decoding/expected/repack.out
@@ -0,0 +1,30 @@
+-- Test REPACK (CONCURRENTLY).
+-- This isn't strictly about decoding, but it involves logical decoding
+-- and requires to be run under higher than minimal wal_level, so we can't
+-- have it in the main regression test suite.
+-- Ownership of partitions is checked
+CREATE TABLE ptnowner(i int unique not null) PARTITION BY LIST (i);
+CREATE INDEX ptnowner_i_idx ON ptnowner(i);
+CREATE TABLE ptnowner1 PARTITION OF ptnowner FOR VALUES IN (1);
+CREATE ROLE regress_ptnowner;
+CREATE TABLE ptnowner2 PARTITION OF ptnowner FOR VALUES IN (2);
+ALTER TABLE ptnowner1 OWNER TO regress_ptnowner;
+SET SESSION AUTHORIZATION regress_ptnowner;
+ALTER TABLE ptnowner1 REPLICA IDENTITY USING INDEX ptnowner1_i_key;
+REPACK (CONCURRENTLY) ptnowner1;
+RESET SESSION AUTHORIZATION;
+ALTER TABLE ptnowner OWNER TO regress_ptnowner;
+CREATE TEMP TABLE ptnowner_oldnodes AS
+  SELECT oid, relname, relfilenode FROM pg_partition_tree('ptnowner') AS tree
+  JOIN pg_class AS c ON c.oid=tree.relid;
+SELECT a.relname, a.relfilenode=b.relfilenode FROM pg_class a
+  JOIN ptnowner_oldnodes b USING (oid) ORDER BY a.relname COLLATE "C";
+  relname  | ?column? 
+-----------+----------
+ ptnowner  | t
+ ptnowner1 | t
+ ptnowner2 | t
+(3 rows)
+
+DROP TABLE ptnowner;
+DROP ROLE regress_ptnowner;
diff --git a/contrib/test_decoding/meson.build b/contrib/test_decoding/meson.build
index cf5b74cf1ab..ac655853d26 100644
--- a/contrib/test_decoding/meson.build
+++ b/contrib/test_decoding/meson.build
@@ -34,6 +34,7 @@ tests += {
       'replorigin',
       'time',
       'messages',
+      'repack',
       'spill',
       'slot',
       'truncate',
diff --git a/contrib/test_decoding/sql/repack.sql b/contrib/test_decoding/sql/repack.sql
new file mode 100644
index 00000000000..bf66bb441ac
--- /dev/null
+++ b/contrib/test_decoding/sql/repack.sql
@@ -0,0 +1,25 @@
+-- Test REPACK (CONCURRENTLY).
+-- This isn't strictly about decoding, but it involves logical decoding
+-- and requires to be run under higher than minimal wal_level, so we can't
+-- have it in the main regression test suite.
+
+
+-- Ownership of partitions is checked
+CREATE TABLE ptnowner(i int unique not null) PARTITION BY LIST (i);
+CREATE INDEX ptnowner_i_idx ON ptnowner(i);
+CREATE TABLE ptnowner1 PARTITION OF ptnowner FOR VALUES IN (1);
+CREATE ROLE regress_ptnowner;
+CREATE TABLE ptnowner2 PARTITION OF ptnowner FOR VALUES IN (2);
+ALTER TABLE ptnowner1 OWNER TO regress_ptnowner;
+SET SESSION AUTHORIZATION regress_ptnowner;
+ALTER TABLE ptnowner1 REPLICA IDENTITY USING INDEX ptnowner1_i_key;
+REPACK (CONCURRENTLY) ptnowner1;
+RESET SESSION AUTHORIZATION;
+ALTER TABLE ptnowner OWNER TO regress_ptnowner;
+CREATE TEMP TABLE ptnowner_oldnodes AS
+  SELECT oid, relname, relfilenode FROM pg_partition_tree('ptnowner') AS tree
+  JOIN pg_class AS c ON c.oid=tree.relid;
+SELECT a.relname, a.relfilenode=b.relfilenode FROM pg_class a
+  JOIN ptnowner_oldnodes b USING (oid) ORDER BY a.relname COLLATE "C";
+DROP TABLE ptnowner;
+DROP ROLE regress_ptnowner;
diff --git a/src/test/regress/expected/cluster.out b/src/test/regress/expected/cluster.out
index 71270134985..b767316cf6b 100644
--- a/src/test/regress/expected/cluster.out
+++ b/src/test/regress/expected/cluster.out
@@ -552,8 +552,6 @@ ALTER TABLE ptnowner1 OWNER TO regress_ptnowner;
 SET SESSION AUTHORIZATION regress_ptnowner;
 CLUSTER ptnowner USING ptnowner_i_idx;
 ERROR:  permission denied for table ptnowner
-ALTER TABLE ptnowner1 REPLICA IDENTITY USING INDEX ptnowner1_i_key;
-REPACK (CONCURRENTLY) ptnowner1;
 RESET SESSION AUTHORIZATION;
 ALTER TABLE ptnowner OWNER TO regress_ptnowner;
 CREATE TEMP TABLE ptnowner_oldnodes AS
@@ -562,30 +560,7 @@ CREATE TEMP TABLE ptnowner_oldnodes AS
 SET SESSION AUTHORIZATION regress_ptnowner;
 CLUSTER ptnowner USING ptnowner_i_idx;
 WARNING:  permission denied to execute CLUSTER on "ptnowner2", skipping it
--- still can't repack without a replica identity
-ALTER TABLE ptnowner1 REPLICA IDENTITY DEFAULT;
-REPACK (CONCURRENTLY) ptnowner1;
-ERROR:  cannot process relation "ptnowner1"
-HINT:  Relation "ptnowner1" has no identity index.
 RESET SESSION AUTHORIZATION;
-SELECT a.relname, a.relfilenode=b.relfilenode FROM pg_class a
-  JOIN ptnowner_oldnodes b USING (oid) ORDER BY a.relname COLLATE "C";
-  relname  | ?column? 
------------+----------
- ptnowner  | t
- ptnowner1 | f
- ptnowner2 | t
-(3 rows)
-
-SELECT a.relname, a.relfilenode=b.relfilenode FROM pg_class a
-  JOIN ptnowner_oldnodes b USING (oid) ORDER BY a.relname COLLATE "C";
-  relname  | ?column? 
------------+----------
- ptnowner  | t
- ptnowner1 | f
- ptnowner2 | t
-(3 rows)
-
 DROP TABLE ptnowner;
 DROP ROLE regress_ptnowner;
 -- Test CLUSTER with external tuplesorting
@@ -731,6 +706,10 @@ COMMIT;
 --
 -- REPACK
 --
+-- Note we cannot test working REPACK (CONCURRENTLY) here, because the
+-- tests could be run with wal_level=minimal, so those tests are
+-- elsewhere.
+--
 ----------------------------------------------------------------------
 -- REPACK handles individual tables identically to CLUSTER, but it's worth
 -- checking if it handles table hierarchies identically as well.
diff --git a/src/test/regress/sql/cluster.sql b/src/test/regress/sql/cluster.sql
index 6746236ffec..a22c75282ee 100644
--- a/src/test/regress/sql/cluster.sql
+++ b/src/test/regress/sql/cluster.sql
@@ -262,8 +262,6 @@ CREATE TABLE ptnowner2 PARTITION OF ptnowner FOR VALUES IN (2);
 ALTER TABLE ptnowner1 OWNER TO regress_ptnowner;
 SET SESSION AUTHORIZATION regress_ptnowner;
 CLUSTER ptnowner USING ptnowner_i_idx;
-ALTER TABLE ptnowner1 REPLICA IDENTITY USING INDEX ptnowner1_i_key;
-REPACK (CONCURRENTLY) ptnowner1;
 RESET SESSION AUTHORIZATION;
 ALTER TABLE ptnowner OWNER TO regress_ptnowner;
 CREATE TEMP TABLE ptnowner_oldnodes AS
@@ -271,14 +269,7 @@ CREATE TEMP TABLE ptnowner_oldnodes AS
   JOIN pg_class AS c ON c.oid=tree.relid;
 SET SESSION AUTHORIZATION regress_ptnowner;
 CLUSTER ptnowner USING ptnowner_i_idx;
--- still can't repack without a replica identity
-ALTER TABLE ptnowner1 REPLICA IDENTITY DEFAULT;
-REPACK (CONCURRENTLY) ptnowner1;
 RESET SESSION AUTHORIZATION;
-SELECT a.relname, a.relfilenode=b.relfilenode FROM pg_class a
-  JOIN ptnowner_oldnodes b USING (oid) ORDER BY a.relname COLLATE "C";
-SELECT a.relname, a.relfilenode=b.relfilenode FROM pg_class a
-  JOIN ptnowner_oldnodes b USING (oid) ORDER BY a.relname COLLATE "C";
 DROP TABLE ptnowner;
 DROP ROLE regress_ptnowner;
 
@@ -346,6 +337,10 @@ COMMIT;
 --
 -- REPACK
 --
+-- Note we cannot test working REPACK (CONCURRENTLY) here, because the
+-- tests could be run with wal_level=minimal, so those tests are
+-- elsewhere.
+--
 ----------------------------------------------------------------------
 
 -- REPACK handles individual tables identically to CLUSTER, but it's worth
-- 
2.47.3


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