mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-19 03:13:24 +02:00
This test, just added in commit a924c327e
, sometimes fails because
the old backend hasn't finished dropping the temporary replication slot
when the new backend looks. Borrow the previously-invented methodology
for waiting for the old process to disappear from pg_stat_activity.
Petr Jelinek
Discussion: https://postgr.es/m/62935e6f-4f1b-c433-e0fa-7f936a38b3e5@2ndquadrant.com
68 lines
1.7 KiB
Plaintext
68 lines
1.7 KiB
Plaintext
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot_p', 'test_decoding');
|
|
?column?
|
|
----------
|
|
init
|
|
(1 row)
|
|
|
|
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot_t', 'test_decoding', true);
|
|
?column?
|
|
----------
|
|
init
|
|
(1 row)
|
|
|
|
SELECT pg_drop_replication_slot('regression_slot_p');
|
|
pg_drop_replication_slot
|
|
--------------------------
|
|
|
|
(1 row)
|
|
|
|
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot_p', 'test_decoding', false);
|
|
?column?
|
|
----------
|
|
init
|
|
(1 row)
|
|
|
|
-- here we want to start a new session and wait till old one is gone
|
|
select pg_backend_pid() as oldpid \gset
|
|
\c -
|
|
do 'declare c int = 0;
|
|
begin
|
|
while (select count(*) from pg_stat_activity where pid = '
|
|
:'oldpid'
|
|
') > 0 loop c := c + 1; perform pg_stat_clear_snapshot(); end loop;
|
|
raise log ''slot test looped % times'', c;
|
|
end';
|
|
-- should fail because the temporary slot was dropped automatically
|
|
SELECT pg_drop_replication_slot('regression_slot_t');
|
|
ERROR: replication slot "regression_slot_t" does not exist
|
|
-- permanent slot has survived
|
|
SELECT pg_drop_replication_slot('regression_slot_p');
|
|
pg_drop_replication_slot
|
|
--------------------------
|
|
|
|
(1 row)
|
|
|
|
-- test switching between slots in a session
|
|
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot1', 'test_decoding', true);
|
|
?column?
|
|
----------
|
|
init
|
|
(1 row)
|
|
|
|
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot2', 'test_decoding', true);
|
|
?column?
|
|
----------
|
|
init
|
|
(1 row)
|
|
|
|
SELECT * FROM pg_logical_slot_get_changes('regression_slot1', NULL, NULL);
|
|
location | xid | data
|
|
----------+-----+------
|
|
(0 rows)
|
|
|
|
SELECT * FROM pg_logical_slot_get_changes('regression_slot2', NULL, NULL);
|
|
location | xid | data
|
|
----------+-----+------
|
|
(0 rows)
|
|
|