From 05aaab6a225195246e70ad465a0995c4c0437e23 Mon Sep 17 00:00:00 2001 From: Daniil Davidov Date: Sun, 3 May 2026 15:51:06 +0700 Subject: [PATCH] Test cross-session LOCK TABLE scenario --- .../test_misc/t/013_temp_obj_multisession.pl | 25 +++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/src/test/modules/test_misc/t/013_temp_obj_multisession.pl b/src/test/modules/test_misc/t/013_temp_obj_multisession.pl index b4442836bef..a7369700580 100644 --- a/src/test/modules/test_misc/t/013_temp_obj_multisession.pl +++ b/src/test/modules/test_misc/t/013_temp_obj_multisession.pl @@ -220,14 +220,39 @@ like( qr/cannot drop table .*\.foo2 because other objects depend on it/, 'DROP TABLE blocked by cross-session dependency'); +my $foo2_oid = $node->safe_psql('postgres', + "SELECT oid FROM pg_class WHERE relname='foo2';"); + +# Cross-session LOCK TABLE scenario. Ensure that LockRelationOid is working +# properly for other temp tables since this mechanism is also used by +# autovacuum during orphaned tables cleanup. +my $psql2 = $node->background_psql('postgres'); +$psql2->query_safe( + qq{ + BEGIN; + LOCK TABLE $tempschema.foo2 IN ACCESS SHARE MODE; +}); + # When the owner session ends, its temp objects are dropped via the # normal session-exit cleanup, which cascades through # DEPENDENCY_NORMAL and also removes the cross-session function that # depended on the temp row type. This is the same mechanism # autovacuum relies on to clean up temp relations left behind by a # crashed backend. +# Access share lock on the foo2 will block session-exit cleanup, because an +# owner will try to acquire deletion lock all its temp objects via +# findDependentObjects. +my $log_offset = -s $node->logfile; $psql1->quit; +# Check whether session-exit cleanup is blocked. +$node->wait_for_log(qr/waiting for AccessExclusiveLock on relation $foo2_oid/, + $log_offset); + +# Release lock on foo2 and allow session-exit cleanup to finish. +$psql2->query_safe(q(COMMIT;)); +$psql2->quit; + $node->poll_query_until( 'postgres', "SELECT NOT EXISTS (SELECT 1 FROM pg_proc WHERE proname = 'cross_session_func')" -- 2.43.0