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Remove the query_id_squash_values GUC

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Commit 62d712ecfd introduced the capability to calculate the same
queryId for queries with different lengths of constants in a list for an
IN clause.  This behavior was originally enabled with a GUC
query_id_squash_values.  After a discussion about the value of such a
GUC, it was decided to back out of the use of a GUC and make the
squashing behavior the only available option.

Author: Sami Imseih <samimseih@gmail.com>
Discussion: https://postgr.es/m/Z-LZyygkkNyA8-kR@msg.df7cb.de
Discussion: https://postgr.es/m/CA+q6zcVTK-3C-8NWV1oY2NZrvtnMCDqnyYYyk1T7WMUG65MeOQ@mail.gmail.com
This commit is contained in:
Álvaro Herrera
2025-03-27 13:33:37 +01:00
parent 5d5f415816
commit 9fbd53dea5
10 changed files with 8 additions and 104 deletions
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10
contrib/pg_stat_statements/sql/squashing.sql
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@ -7,16 +7,7 @@ CREATE TABLE test_squash (id int, data int);
-- IN queries
-- No squashing is performed, as a baseline result
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
SELECT * FROM test_squash WHERE id IN (1, 2, 3, 4, 5, 6, 7, 8, 9);
SELECT * FROM test_squash WHERE id IN (1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
SELECT * FROM test_squash WHERE id IN (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11);
SELECT query, calls FROM pg_stat_statements ORDER BY query COLLATE "C";
-- Normal scenario, too many simple constants for an IN query
SET query_id_squash_values = on;
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
SELECT * FROM test_squash WHERE id IN (1);
SELECT * FROM test_squash WHERE id IN (1, 2, 3);
@ -177,4 +168,3 @@ SELECT pg_stat_statements_reset() IS NOT NULL AS t;
SELECT ARRAY[1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
SELECT query, calls FROM pg_stat_statements ORDER BY query COLLATE "C";
RESET query_id_squash_values;