1SET synchronous_commit = on;
2CREATE TABLE test_time(data text);
3-- remember the current time
4SELECT set_config('test.time_before', NOW()::text, false) IS NOT NULL;
5 ?column?
6----------
7 t
8(1 row)
9
10SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
11 ?column?
12----------
13 init
14(1 row)
15
16-- a single transaction, to get the commit time
17INSERT INTO test_time(data) VALUES ('');
18-- parse the commit time from the changeset
19SELECT set_config('test.time_after', regexp_replace(data, '^COMMIT \(at (.*)\)$', '\1'), false) IS NOT NULL
20FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1', 'include-timestamp', '1')
21WHERE data ~ 'COMMIT' LIMIT 1;
22 ?column?
23----------
24 t
25(1 row)
26
27-- ensure commit time is sane in relation to the previous time
28SELECT (time_after - time_before) <= '10 minutes'::interval, time_after >= time_before
29FROM (SELECT current_setting('test.time_after')::timestamptz AS time_after, (SELECT current_setting('test.time_before')::timestamptz) AS time_before) AS d;
30 ?column? | ?column?
31----------+----------
32 t        | t
33(1 row)
34
35SELECT pg_drop_replication_slot('regression_slot');
36 pg_drop_replication_slot
37--------------------------
38
39(1 row)
40
41