Subject: [PATCH v6 1/2] fix MAINTAIN privs for partitions

From: Nathan Bossart <[email-masked]>
Date: Mon, 9 Jan 2023 14:29:24 -0800

---
 doc/src/sgml/ref/analyze.sgml                 |  5 ++-
 doc/src/sgml/ref/cluster.sgml                 | 17 ++++++---
 doc/src/sgml/ref/lock.sgml                    |  5 ++-
 doc/src/sgml/ref/reindex.sgml                 |  6 +++-
 doc/src/sgml/ref/vacuum.sgml                  |  5 ++-
 src/backend/commands/cluster.c                | 35 +++++++++++++------
 src/backend/commands/indexcmds.c              | 22 ++++++------
 src/backend/commands/lockcmds.c               |  8 +++++
 src/backend/commands/tablecmds.c              | 30 ++++++++++++++--
 src/backend/commands/vacuum.c                 |  9 +++--
 src/include/commands/tablecmds.h              |  1 +
 .../expected/cluster-conflict-partition.out   |  6 ++--
 .../specs/cluster-conflict-partition.spec     |  5 +--
 src/test/regress/expected/cluster.out         |  4 ++-
 src/test/regress/expected/vacuum.out          | 18 ----------
 src/test/regress/sql/cluster.sql              |  2 ++
 16 files changed, 119 insertions(+), 59 deletions(-)

diff --git a/doc/src/sgml/ref/analyze.sgml b/doc/src/sgml/ref/analyze.sgml
index a26834da4f..2f94e89cb0 100644
--- a/doc/src/sgml/ref/analyze.sgml
+++ b/doc/src/sgml/ref/analyze.sgml
@@ -156,7 +156,10 @@ ANALYZE [ VERBOSE ] [ <replaceable class="parameter">table_and_columns</replacea
    analyze all tables in their databases, except shared catalogs.
    (The restriction for shared catalogs means that a true database-wide
    <command>ANALYZE</command> can only be performed by superusers and roles
-   with privileges of <literal>pg_maintain</literal>.)
+   with privileges of <literal>pg_maintain</literal>.)  If a role has
+   permission to <command>ANALYZE</command> a partitioned table, it is also
+   permitted to <command>ANALYZE</command> each of its partitions, regardless
+   of whether the role has the aforementioned privileges on the partition.
    <command>ANALYZE</command> will skip over any tables that the calling user
    does not have permission to analyze.
   </para>
diff --git a/doc/src/sgml/ref/cluster.sgml b/doc/src/sgml/ref/cluster.sgml
index 145101e6a5..b9f2acb1de 100644
--- a/doc/src/sgml/ref/cluster.sgml
+++ b/doc/src/sgml/ref/cluster.sgml
@@ -69,10 +69,7 @@ CLUSTER [VERBOSE]
   <para>
    <command>CLUSTER</command> without any parameter reclusters all the
    previously-clustered tables in the current database that the calling user
-   owns or has the <literal>MAINTAIN</literal> privilege for, or all such tables
-   if called by a superuser or a role with privileges of the
-   <link linkend="predefined-roles-table"><literal>pg_maintain</literal></link>
-   role.  This form of <command>CLUSTER</command> cannot be
+   has privileges for.  This form of <command>CLUSTER</command> cannot be
    executed inside a transaction block.
   </para>
 
@@ -134,6 +131,18 @@ CLUSTER [VERBOSE]
  <refsect1>
   <title>Notes</title>
 
+   <para>
+    To cluster a table, one must have the <literal>MAINTAIN</literal> privilege
+    on the table or be the table's owner, a superuser, or a role with
+    privileges of the
+    <link linkend="predefined-roles-table"><literal>pg_maintain</literal></link>
+    role.  If a role has permission to <command>CLUSTER</command> a partitioned
+    table, it is also permitted to <command>CLUSTER</command> each of its
+    partitions, regardless of whether the role has the aforementioned
+    privileges on the partition.  <command>CLUSTER</command> will skip over any
+    tables that the calling user does not have permission to cluster.
+   </para>
+
    <para>
     In cases where you are accessing single rows randomly
     within a table, the actual order of the data in the
diff --git a/doc/src/sgml/ref/lock.sgml b/doc/src/sgml/ref/lock.sgml
index 8524182211..5b3b2b793a 100644
--- a/doc/src/sgml/ref/lock.sgml
+++ b/doc/src/sgml/ref/lock.sgml
@@ -177,7 +177,10 @@ LOCK [ TABLE ] [ ONLY ] <replaceable class="parameter">name</replaceable> [ * ]
     MODE</literal> (or a less-conflicting mode as described in <xref
     linkend="explicit-locking"/>) is permitted. If a user has
     <literal>SELECT</literal> privileges on the table, <literal>ACCESS SHARE
-    MODE</literal> is permitted.
+    MODE</literal> is permitted.  If a role has permission to lock a
+    partitioned table, it is also permitted to lock each of its partitions,
+    regardless of whether the role has the aforementioned privileges on the
+    partition.
    </para>
 
    <para>
diff --git a/doc/src/sgml/ref/reindex.sgml b/doc/src/sgml/ref/reindex.sgml
index 192513f34e..c6ad2546f9 100644
--- a/doc/src/sgml/ref/reindex.sgml
+++ b/doc/src/sgml/ref/reindex.sgml
@@ -306,7 +306,11 @@ REINDEX [ ( <replaceable class="parameter">option</replaceable> [, ...] ) ] { DA
    indexes on shared catalogs will be skipped unless the user owns the
    catalog (which typically won't be the case), has privileges of the
    <literal>pg_maintain</literal> role, or has the <literal>MAINTAIN</literal>
-   privilege on the catalog.  Of course, superusers can always reindex anything.
+   privilege on the catalog.  If a role has permission to
+   <command>REINDEX</command> a partitioned table, it is also permitted to
+   <command>REINDEX</command> each of its partitions, regardless of whether the
+   role has the aforementioned privileges on the partition.  Of course,
+   superusers can always reindex anything.
   </para>
 
   <para>
diff --git a/doc/src/sgml/ref/vacuum.sgml b/doc/src/sgml/ref/vacuum.sgml
index 8fa8421847..545b23b54f 100644
--- a/doc/src/sgml/ref/vacuum.sgml
+++ b/doc/src/sgml/ref/vacuum.sgml
@@ -401,7 +401,10 @@ VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] [ ANALYZE ] [ <replaceable class="paramet
     vacuum all tables in their databases, except shared catalogs.
     (The restriction for shared catalogs means that a true database-wide
     <command>VACUUM</command> can only be performed by superusers and roles
-    with privileges of <literal>pg_maintain</literal>.)
+    with privileges of <literal>pg_maintain</literal>.)  If a role has
+    permission to <command>VACUUM</command> a partitioned table, it is also
+    permitted to <command>VACUUM</command> each of its partitions, regardless
+    of whether the role has the aforementioned privileges on the partition.
     <command>VACUUM</command> will skip over any tables that the calling user
     does not have permission to vacuum.
    </para>
diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c
index f11691aff7..369fea7c04 100644
--- a/src/backend/commands/cluster.c
+++ b/src/backend/commands/cluster.c
@@ -80,6 +80,7 @@ static void copy_table_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex,
 static List *get_tables_to_cluster(MemoryContext cluster_context);
 static List *get_tables_to_cluster_partitioned(MemoryContext cluster_context,
 											   Oid indexOid);
+static bool cluster_is_permitted_for_relation(Oid relid, Oid userid);

 /*---------------------------------------------------------------------------
@@ -366,8 +367,7 @@ cluster_rel(Oid tableOid, Oid indexOid, ClusterParams *params)
 	if (recheck)
 	{
 		/* Check that the user still has privileges for the relation */
-		if (!object_ownercheck(RelationRelationId, tableOid, save_userid) &&
-			pg_class_aclcheck(tableOid, save_userid, ACL_MAINTAIN) != ACLCHECK_OK)
+		if (!cluster_is_permitted_for_relation(tableOid, save_userid))
 		{
 			relation_close(OldHeap, AccessExclusiveLock);
 			goto out;
@@ -1645,8 +1645,7 @@ get_tables_to_cluster(MemoryContext cluster_context)
 
 		index = (Form_pg_index) GETSTRUCT(indexTuple);
 
-		if (!object_ownercheck(RelationRelationId, index->indrelid, GetUserId()) &&
-			pg_class_aclcheck(index->indrelid, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK)
+		if (!cluster_is_permitted_for_relation(index->indrelid, GetUserId()))
 			continue;
 
 		/* Use a permanent memory context for the result list */
@@ -1694,12 +1693,11 @@ get_tables_to_cluster_partitioned(MemoryContext cluster_context, Oid indexOid)
 		if (get_rel_relkind(indexrelid) != RELKIND_INDEX)
 			continue;
 
-		/* Silently skip partitions which the user has no access to. */
-		if (!object_ownercheck(RelationRelationId, relid, GetUserId()) &&
-			pg_class_aclcheck(relid, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK &&
-			(!object_ownercheck(DatabaseRelationId, MyDatabaseId, GetUserId()) ||
-			 IsSharedRelation(relid)))
-			continue;
+		/*
+		 * We already checked that the user has privileges to CLUSTER the
+		 * partitioned table when we locked it earlier, so there's no need to
+		 * check the privileges again here.
+		 */
 
 		/* Use a permanent memory context for the result list */
 		old_context = MemoryContextSwitchTo(cluster_context);
@@ -1714,3 +1712,20 @@ get_tables_to_cluster_partitioned(MemoryContext cluster_context, Oid indexOid)
 
 	return rtcs;
 }
+
+/*
+ * Return whether userid has privileges to CLUSTER relid.  If not, this
+ * function emits a WARNING.
+ */
+static bool
+cluster_is_permitted_for_relation(Oid relid, Oid userid)
+{
+	if (pg_class_aclcheck(relid, userid, ACL_MAINTAIN) == ACLCHECK_OK ||
+		has_partition_ancestor_privs(relid, userid, ACL_MAINTAIN))
+		return true;
+
+	ereport(WARNING,
+			(errmsg("permission denied to cluster \"%s\", skipping it",
+					get_rel_name(relid))));
+	return false;
+}
diff --git a/src/backend/commands/indexcmds.c b/src/backend/commands/indexcmds.c
index 8afc006f89..16ec0b114e 100644
--- a/src/backend/commands/indexcmds.c
+++ b/src/backend/commands/indexcmds.c
@@ -2796,9 +2796,9 @@ RangeVarCallbackForReindexIndex(const RangeVar *relation,
 
 	/* Check permissions */
 	table_oid = IndexGetRelation(relId, true);
-	if (!object_ownercheck(RelationRelationId, relId, GetUserId()) &&
-		OidIsValid(table_oid) &&
-		pg_class_aclcheck(table_oid, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK)
+	if (OidIsValid(table_oid) &&
+		pg_class_aclcheck(table_oid, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK &&
+		!has_partition_ancestor_privs(table_oid, GetUserId(), ACL_MAINTAIN))
 		aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_INDEX,
 					   relation->relname);
 
@@ -3008,16 +3008,16 @@ ReindexMultipleTables(const char *objectName, ReindexObjectType objectKind,
 
 		/*
 		 * The table can be reindexed if the user has been granted MAINTAIN on
-		 * the table or the user is a superuser, the table owner, or the
-		 * database/schema owner (but in the latter case, only if it's not a
-		 * shared relation).  object_ownercheck includes the superuser case,
-		 * and depending on objectKind we already know that the user has
-		 * permission to run REINDEX on this database or schema per the
-		 * permission checks at the beginning of this routine.
+		 * the table or one of its partition ancestors or the user is a
+		 * superuser, the table owner, or the database/schema owner (but in the
+		 * latter case, only if it's not a shared relation).  pg_class_aclcheck
+		 * includes the superuser case, and depending on objectKind we already
+		 * know that the user has permission to run REINDEX on this database or
+		 * schema per the permission checks at the beginning of this routine.
 		 */
 		if (classtuple->relisshared &&
-			!object_ownercheck(RelationRelationId, relid, GetUserId()) &&
-			pg_class_aclcheck(relid, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK)
+			pg_class_aclcheck(relid, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK &&
+			!has_partition_ancestor_privs(relid, GetUserId(), ACL_MAINTAIN))
 			continue;
 
 		/*
diff --git a/src/backend/commands/lockcmds.c b/src/backend/commands/lockcmds.c
index 410d78b040..6bf1b815f0 100644
--- a/src/backend/commands/lockcmds.c
+++ b/src/backend/commands/lockcmds.c
@@ -19,6 +19,7 @@
 #include "catalog/namespace.h"
 #include "catalog/pg_inherits.h"
 #include "commands/lockcmds.h"
+#include "commands/tablecmds.h"
 #include "miscadmin.h"
 #include "nodes/nodeFuncs.h"
 #include "parser/parse_clause.h"
@@ -305,5 +306,12 @@ LockTableAclCheck(Oid reloid, LOCKMODE lockmode, Oid userid)
 
 	aclresult = pg_class_aclcheck(reloid, userid, aclmask);
 
+	/*
+	 * If this is a partition, check permissions of its ancestors if needed.
+	 */
+	if (aclresult != ACLCHECK_OK &&
+		has_partition_ancestor_privs(reloid, userid, ACL_MAINTAIN))
+		aclresult = ACLCHECK_OK;
+
 	return aclresult;
 }
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 1fbdad4b64..7c697a285b 100644
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -16886,12 +16886,38 @@ RangeVarCallbackMaintainsTable(const RangeVar *relation,
 				 errmsg("\"%s\" is not a table or materialized view", relation->relname)));
 
 	/* Check permissions */
-	if (!object_ownercheck(RelationRelationId, relId, GetUserId()) &&
-		pg_class_aclcheck(relId, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK)
+	if (pg_class_aclcheck(relId, GetUserId(), ACL_MAINTAIN) != ACLCHECK_OK &&
+		!has_partition_ancestor_privs(relId, GetUserId(), ACL_MAINTAIN))
 		aclcheck_error(ACLCHECK_NOT_OWNER, OBJECT_TABLE,
 					   relation->relname);
 }
 
+/*
+ * If relid is a partition, returns whether userid has any of the privileges
+ * specified in acl on any of its ancestors.  Otherwise, returns false.
+ */
+bool
+has_partition_ancestor_privs(Oid relid, Oid userid, AclMode acl)
+{
+	List	   *ancestors;
+	ListCell   *lc;
+
+	if (!get_rel_relispartition(relid))
+		return false;
+
+	ancestors = get_partition_ancestors(relid);
+	foreach(lc, ancestors)
+	{
+		Oid			ancestor = lfirst_oid(lc);
+
+		if (OidIsValid(ancestor) &&
+			pg_class_aclcheck(ancestor, userid, acl) == ACLCHECK_OK)
+			return true;
+	}
+
+	return false;
+}
+
 /*
  * Callback to RangeVarGetRelidExtended() for TRUNCATE processing.
  */
diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c
index ea1428dc8c..076b1e54eb 100644
--- a/src/backend/commands/vacuum.c
+++ b/src/backend/commands/vacuum.c
@@ -41,6 +41,7 @@
 #include "catalog/pg_namespace.h"
 #include "commands/cluster.h"
 #include "commands/defrem.h"
+#include "commands/tablecmds.h"
 #include "commands/vacuum.h"
 #include "miscadmin.h"
 #include "nodes/makefuncs.h"
@@ -598,11 +599,13 @@ vacuum_is_permitted_for_relation(Oid relid, Form_pg_class reltuple,
 	 *   - the role owns the relation
 	 *   - the role owns the current database and the relation is not shared
 	 *   - the role has been granted the MAINTAIN privilege on the relation
+	 *   - the role has privileges to vacuum/analyze any of the relation's
+	 *     partition ancestors
 	 *----------
 	 */
-	if (object_ownercheck(RelationRelationId, relid, GetUserId()) ||
-		(object_ownercheck(DatabaseRelationId, MyDatabaseId, GetUserId()) && !reltuple->relisshared) ||
-		pg_class_aclcheck(relid, GetUserId(), ACL_MAINTAIN) == ACLCHECK_OK)
+	if ((object_ownercheck(DatabaseRelationId, MyDatabaseId, GetUserId()) && !reltuple->relisshared) ||
+		pg_class_aclcheck(relid, GetUserId(), ACL_MAINTAIN) == ACLCHECK_OK ||
+		has_partition_ancestor_privs(relid, GetUserId(), ACL_MAINTAIN))
 		return true;
 
 	relname = NameStr(reltuple->relname);
diff --git a/src/include/commands/tablecmds.h b/src/include/commands/tablecmds.h
index 2e717fa815..e7c2b91a58 100644
--- a/src/include/commands/tablecmds.h
+++ b/src/include/commands/tablecmds.h
@@ -98,6 +98,7 @@ extern void AtEOSubXact_on_commit_actions(bool isCommit,
 extern void RangeVarCallbackMaintainsTable(const RangeVar *relation,
 										   Oid relId, Oid oldRelId,
 										   void *arg);
+extern bool has_partition_ancestor_privs(Oid relid, Oid userid, AclMode acl);
 
 extern void RangeVarCallbackOwnsRelation(const RangeVar *relation,
 										 Oid relId, Oid oldRelId, void *arg);
diff --git a/src/test/isolation/expected/cluster-conflict-partition.out b/src/test/isolation/expected/cluster-conflict-partition.out
index 7acb675c97..8d21276996 100644
--- a/src/test/isolation/expected/cluster-conflict-partition.out
+++ b/src/test/isolation/expected/cluster-conflict-partition.out
@@ -22,14 +22,16 @@ starting permutation: s1_begin s1_lock_child s2_auth s2_cluster s1_commit s2_res
 step s1_begin: BEGIN;
 step s1_lock_child: LOCK cluster_part_tab1 IN SHARE UPDATE EXCLUSIVE MODE;
 step s2_auth: SET ROLE regress_cluster_part;
-step s2_cluster: CLUSTER cluster_part_tab USING cluster_part_ind;
+step s2_cluster: CLUSTER cluster_part_tab USING cluster_part_ind; <waiting ...>
 step s1_commit: COMMIT;
+step s2_cluster: <... completed>
 step s2_reset: RESET ROLE;
 
 starting permutation: s1_begin s2_auth s1_lock_child s2_cluster s1_commit s2_reset
 step s1_begin: BEGIN;
 step s2_auth: SET ROLE regress_cluster_part;
 step s1_lock_child: LOCK cluster_part_tab1 IN SHARE UPDATE EXCLUSIVE MODE;
-step s2_cluster: CLUSTER cluster_part_tab USING cluster_part_ind;
+step s2_cluster: CLUSTER cluster_part_tab USING cluster_part_ind; <waiting ...>
 step s1_commit: COMMIT;
+step s2_cluster: <... completed>
 step s2_reset: RESET ROLE;
diff --git a/src/test/isolation/specs/cluster-conflict-partition.spec b/src/test/isolation/specs/cluster-conflict-partition.spec
index 5091f684a9..ae38cb4ee3 100644
--- a/src/test/isolation/specs/cluster-conflict-partition.spec
+++ b/src/test/isolation/specs/cluster-conflict-partition.spec
@@ -27,11 +27,8 @@ step s2_auth           { SET ROLE regress_cluster_part; }
 step s2_cluster        { CLUSTER cluster_part_tab USING cluster_part_ind; }
 step s2_reset          { RESET ROLE; }
 
-# CLUSTER on the parent waits if locked, passes for all cases.
+# CLUSTER waits if locked, passes for all cases.
 permutation s1_begin s1_lock_parent s2_auth s2_cluster s1_commit s2_reset
 permutation s1_begin s2_auth s1_lock_parent s2_cluster s1_commit s2_reset
-
-# When taking a lock on a partition leaf, CLUSTER on the parent skips
-# the leaf, passes for all cases.
 permutation s1_begin s1_lock_child s2_auth s2_cluster s1_commit s2_reset
 permutation s1_begin s2_auth s1_lock_child s2_cluster s1_commit s2_reset
diff --git a/src/test/regress/expected/cluster.out b/src/test/regress/expected/cluster.out
index 542c2e098c..2eec483eaa 100644
--- a/src/test/regress/expected/cluster.out
+++ b/src/test/regress/expected/cluster.out
@@ -352,7 +352,9 @@ INSERT INTO clstr_3 VALUES (1);
 -- this user can only cluster clstr_1 and clstr_3, but the latter
 -- has not been clustered
 SET SESSION AUTHORIZATION regress_clstr_user;
+SET client_min_messages = ERROR;  -- order of "skipping" warnings may vary
 CLUSTER;
+RESET client_min_messages;
 SELECT * FROM clstr_1 UNION ALL
   SELECT * FROM clstr_2 UNION ALL
   SELECT * FROM clstr_3;
@@ -513,7 +515,7 @@ SELECT a.relname, a.relfilenode=b.relfilenode FROM pg_class a
 -----------+----------
  ptnowner  | t
  ptnowner1 | f
- ptnowner2 | t
+ ptnowner2 | f
 (3 rows)
 
 DROP TABLE ptnowner;
diff --git a/src/test/regress/expected/vacuum.out b/src/test/regress/expected/vacuum.out
index d860be0e20..458adee7f8 100644
--- a/src/test/regress/expected/vacuum.out
+++ b/src/test/regress/expected/vacuum.out
@@ -353,20 +353,14 @@ ALTER TABLE vacowned_parted OWNER TO regress_vacuum;
 ALTER TABLE vacowned_part1 OWNER TO regress_vacuum;
 SET ROLE regress_vacuum;
 VACUUM vacowned_parted;
-WARNING:  permission denied to vacuum "vacowned_part2", skipping it
 VACUUM vacowned_part1;
 VACUUM vacowned_part2;
-WARNING:  permission denied to vacuum "vacowned_part2", skipping it
 ANALYZE vacowned_parted;
-WARNING:  permission denied to analyze "vacowned_part2", skipping it
 ANALYZE vacowned_part1;
 ANALYZE vacowned_part2;
-WARNING:  permission denied to analyze "vacowned_part2", skipping it
 VACUUM (ANALYZE) vacowned_parted;
-WARNING:  permission denied to vacuum "vacowned_part2", skipping it
 VACUUM (ANALYZE) vacowned_part1;
 VACUUM (ANALYZE) vacowned_part2;
-WARNING:  permission denied to vacuum "vacowned_part2", skipping it
 RESET ROLE;
 -- Only one partition owned by other user.
 ALTER TABLE vacowned_parted OWNER TO CURRENT_USER;
@@ -395,26 +389,14 @@ ALTER TABLE vacowned_parted OWNER TO regress_vacuum;
 ALTER TABLE vacowned_part1 OWNER TO CURRENT_USER;
 SET ROLE regress_vacuum;
 VACUUM vacowned_parted;
-WARNING:  permission denied to vacuum "vacowned_part1", skipping it
-WARNING:  permission denied to vacuum "vacowned_part2", skipping it
 VACUUM vacowned_part1;
-WARNING:  permission denied to vacuum "vacowned_part1", skipping it
 VACUUM vacowned_part2;
-WARNING:  permission denied to vacuum "vacowned_part2", skipping it
 ANALYZE vacowned_parted;
-WARNING:  permission denied to analyze "vacowned_part1", skipping it
-WARNING:  permission denied to analyze "vacowned_part2", skipping it
 ANALYZE vacowned_part1;
-WARNING:  permission denied to analyze "vacowned_part1", skipping it
 ANALYZE vacowned_part2;
-WARNING:  permission denied to analyze "vacowned_part2", skipping it
 VACUUM (ANALYZE) vacowned_parted;
-WARNING:  permission denied to vacuum "vacowned_part1", skipping it
-WARNING:  permission denied to vacuum "vacowned_part2", skipping it
 VACUUM (ANALYZE) vacowned_part1;
-WARNING:  permission denied to vacuum "vacowned_part1", skipping it
 VACUUM (ANALYZE) vacowned_part2;
-WARNING:  permission denied to vacuum "vacowned_part2", skipping it
 RESET ROLE;
 DROP TABLE vacowned;
 DROP TABLE vacowned_parted;
diff --git a/src/test/regress/sql/cluster.sql b/src/test/regress/sql/cluster.sql
index 6cb9c926c0..a4cfaae807 100644
--- a/src/test/regress/sql/cluster.sql
+++ b/src/test/regress/sql/cluster.sql
@@ -145,7 +145,9 @@ INSERT INTO clstr_3 VALUES (1);
 -- this user can only cluster clstr_1 and clstr_3, but the latter
 -- has not been clustered
 SET SESSION AUTHORIZATION regress_clstr_user;
+SET client_min_messages = ERROR;  -- order of "skipping" warnings may vary
 CLUSTER;
+RESET client_min_messages;
 SELECT * FROM clstr_1 UNION ALL
   SELECT * FROM clstr_2 UNION ALL
   SELECT * FROM clstr_3;
-- 
2.25.1

--sdtB3X0nJg68CQEu
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Content-Disposition: attachment;
	filename="v6-0002-fix-MAINTAIN-privs-for-TOAST-tables.patch"