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help / color / mirror / Atom feedFrom: Álvaro Herrera <[email protected]>
Subject: [PATCH 1/2] REPACK: do not require the user to have REPLICATION
Date: Mon, 20 Apr 2026 11:38:48 +0200
Although REPACK (CONCURRENTLY) uses replication slots, there is no
concern that the slot will leak data of other users, because the
MAINTAIN privilege on the table is required anyway; requiring
REPLICATION is user-unfriendly without providing any actual protection.
A related aspect is that the REPLICATION attribute is not needed to
prevent REPACK from stealing slots from logical replication, since
commit e76d8c749c31 made REPACK use a separate pool of replication
slots.
Because there are now successful concurrent repack runs in the
regression tests, we're forced to run test_plan_advice under
wal_level=replica.
Author: Antonin Houska <[email protected]>
Reported-by: Justin Pryzby <[email protected]>
Reviewed-by: Chao Li <[email protected]>
Discussion: https://postgr.es/m/aeJHPNmL4vVy3oPw@pryzbyj2023
---
src/backend/commands/repack_worker.c | 1 -
.../test_plan_advice/t/001_replan_regress.pl | 1 +
src/test/regress/expected/cluster.out | 20 +++++++++++++++++--
src/test/regress/sql/cluster.sql | 11 ++++++++--
4 files changed, 28 insertions(+), 5 deletions(-)
diff --git a/src/backend/commands/repack_worker.c b/src/backend/commands/repack_worker.c
index b17edd771e2..e4a4860805b 100644
--- a/src/backend/commands/repack_worker.c
+++ b/src/backend/commands/repack_worker.c
@@ -214,7 +214,6 @@ repack_setup_logical_decoding(Oid relid)
/*
* Make sure we can use logical decoding.
*/
- CheckSlotPermissions();
CheckLogicalDecodingRequirements(true);
/*
diff --git a/src/test/modules/test_plan_advice/t/001_replan_regress.pl b/src/test/modules/test_plan_advice/t/001_replan_regress.pl
index 38ffa4d11ae..452b179a665 100644
--- a/src/test/modules/test_plan_advice/t/001_replan_regress.pl
+++ b/src/test/modules/test_plan_advice/t/001_replan_regress.pl
@@ -18,6 +18,7 @@ $node->init();
# Set up our desired configuration.
$node->append_conf('postgresql.conf', <<EOM);
shared_preload_libraries='test_plan_advice'
+wal_level=replica
pg_plan_advice.always_explain_supplied_advice=false
pg_plan_advice.feedback_warnings=true
EOM
diff --git a/src/test/regress/expected/cluster.out b/src/test/regress/expected/cluster.out
index 6127b215a86..e17bc91fae1 100644
--- a/src/test/regress/expected/cluster.out
+++ b/src/test/regress/expected/cluster.out
@@ -543,15 +543,17 @@ ERROR: REPACK (CONCURRENTLY) is not supported for partitioned tables
HINT: Consider running the command on individual partitions.
DROP TABLE clstrpart;
-- Ownership of partitions is checked
-CREATE TABLE ptnowner(i int unique) PARTITION BY LIST (i);
+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 ROLE regress_ptnowner LOGIN;
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;
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
@@ -560,6 +562,11 @@ 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";
@@ -570,6 +577,15 @@ SELECT a.relname, a.relfilenode=b.relfilenode FROM pg_class a
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
diff --git a/src/test/regress/sql/cluster.sql b/src/test/regress/sql/cluster.sql
index d14063a9683..1f471a8821a 100644
--- a/src/test/regress/sql/cluster.sql
+++ b/src/test/regress/sql/cluster.sql
@@ -254,14 +254,16 @@ REPACK (CONCURRENTLY) clstrpart;
DROP TABLE clstrpart;
-- Ownership of partitions is checked
-CREATE TABLE ptnowner(i int unique) PARTITION BY LIST (i);
+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 ROLE regress_ptnowner LOGIN;
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
@@ -269,7 +271,12 @@ 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;
--
2.47.3
--m6zy3l65ushq557m
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment;
filename="0002-REPACK-do-not-require-LOGIN-privileges.patch"
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