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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
89 lines
2.0 KiB
Plaintext
89 lines
2.0 KiB
Plaintext
--
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-- Information related to planning
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--
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-- These tests require track_planning to be enabled.
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SET pg_stat_statements.track_planning = TRUE;
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SELECT pg_stat_statements_reset() IS NOT NULL AS t;
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t
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---
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t
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(1 row)
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--
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-- [re]plan counting
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--
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CREATE TABLE stats_plan_test ();
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PREPARE prep1 AS SELECT COUNT(*) FROM stats_plan_test;
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EXECUTE prep1;
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count
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-------
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0
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(1 row)
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EXECUTE prep1;
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count
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-------
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0
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(1 row)
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EXECUTE prep1;
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count
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-------
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0
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(1 row)
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ALTER TABLE stats_plan_test ADD COLUMN x int;
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EXECUTE prep1;
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count
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-------
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0
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(1 row)
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SELECT 42;
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?column?
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----------
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42
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(1 row)
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SELECT 42;
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?column?
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----------
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42
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(1 row)
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SELECT 42;
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?column?
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----------
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42
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(1 row)
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SELECT plans, calls, rows, query FROM pg_stat_statements
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WHERE query NOT LIKE 'PREPARE%' ORDER BY query COLLATE "C";
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plans | calls | rows | query
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-------+-------+------+----------------------------------------------------------
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0 | 1 | 0 | ALTER TABLE stats_plan_test ADD COLUMN x int
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0 | 1 | 0 | CREATE TABLE stats_plan_test ()
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3 | 3 | 3 | SELECT $1
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0 | 1 | 1 | SELECT pg_stat_statements_reset() IS NOT NULL AS t
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1 | 0 | 0 | SELECT plans, calls, rows, query FROM pg_stat_statements+
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| | | WHERE query NOT LIKE $1 ORDER BY query COLLATE "C"
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(5 rows)
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-- for the prepared statement we expect at least one replan, but cache
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-- invalidations could force more
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SELECT plans >= 2 AND plans <= calls AS plans_ok, calls, rows, query FROM pg_stat_statements
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WHERE query LIKE 'PREPARE%' ORDER BY query COLLATE "C";
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plans_ok | calls | rows | query
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----------+-------+------+-------------------------------------------------------
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t | 4 | 4 | PREPARE prep1 AS SELECT COUNT(*) FROM stats_plan_test
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(1 row)
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-- Cleanup
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DROP TABLE stats_plan_test;
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SELECT pg_stat_statements_reset() IS NOT NULL AS t;
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t
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---
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t
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(1 row)
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