mirror of
https://github.com/postgres/postgres.git
synced 2025-04-22 23:02:54 +03:00
6ab1dbd26b
This is preliminary patch. It adds NOT NULL checking for the result of pg_stat_statements_reset() function. It is needed for upcoming patch "Track statement entry timestamp" that will change the result type of this function to the timestamp of a reset performed. Discussion: https://postgr.es/m/flat/72e80e7b160a6eb189df9ef6f068cce3765d37f8.camel%40moonset.ru Author: Andrei Zubkov Reviewed-by: Julien Rouhaud, Hayato Kuroda, Yuki Seino, Chengxi Sun Reviewed-by: Anton Melnikov, Darren Rush, Michael Paquier, Sergei Kornilov Reviewed-by: Alena Rybakina, Andrei Lepikhov
21 lines
617 B
SQL
21 lines
617 B
SQL
--
|
|
-- Validate WAL generation metrics
|
|
--
|
|
|
|
SET pg_stat_statements.track_utility = FALSE;
|
|
|
|
CREATE TABLE pgss_wal_tab (a int, b char(20));
|
|
|
|
INSERT INTO pgss_wal_tab VALUES(generate_series(1, 10), 'aaa');
|
|
UPDATE pgss_wal_tab SET b = 'bbb' WHERE a > 7;
|
|
DELETE FROM pgss_wal_tab WHERE a > 9;
|
|
DROP TABLE pgss_wal_tab;
|
|
|
|
-- Check WAL is generated for the above statements
|
|
SELECT query, calls, rows,
|
|
wal_bytes > 0 as wal_bytes_generated,
|
|
wal_records > 0 as wal_records_generated,
|
|
wal_records >= rows as wal_records_ge_rows
|
|
FROM pg_stat_statements ORDER BY query COLLATE "C";
|
|
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
|