postgresql/contrib/pg_stat_statements/sql
Michael Paquier 9c3caad026 Fix query jumbling with GROUP BY clauses
RangeTblEntry.groupexprs was marked with the node attribute
query_jumble_ignore, causing a list of GROUP BY expressions to be
ignored during the query jumbling.  For example, these two queries could
be grouped together within the same query ID:
SELECT count(*) FROM t GROUP BY a;
SELECT count(*) FROM t GROUP BY b;

However, as such queries use different GROUP BY clauses, they should be
split across multiple entries.

This fixes an oversight in 247dea89f7, that has introduced an RTE for
GROUP BY clauses.  Query IDs are documented as being stable across minor
releases, but as this is a regression new to v18 and that we are still
early in its support cycle, a backpatch is exceptionally done as this
has broken a behavior that exists since query jumbling is supported in
core, since its introduction in pg_stat_statements.

The tests of pg_stat_statements are expanded to cover this area, with
patterns involving GROUP BY and GROUPING clauses.

Author: Jian He <jian.universality@gmail.com>
Discussion: https://postgr.es/m/CACJufxEy2W+tCqC7XuJ94r3ivWsM=onKJp94kRFx3hoARjBeFQ@mail.gmail.com
Backpatch-through: 18
2026-01-14 08:44:52 +09:00
..
cleanup.sql Refactor tests of pg_stat_statements for planning, utility and level tracking 2023-02-20 09:28:29 +09:00
cursors.sql Add NOT NULL checking of pg_stat_statements_reset() in tests 2023-11-27 02:52:17 +02:00
dml.sql Add NOT NULL checking of pg_stat_statements_reset() in tests 2023-11-27 02:52:17 +02:00
entry_timestamp.sql Track statement entry timestamp in contrib/pg_stat_statements 2023-11-27 02:52:17 +02:00
extended.sql Make query jumbling also squash PARAM_EXTERN params 2025-06-24 19:36:32 +02:00
level_tracking.sql Fix regression with location calculation of nested statements 2025-05-21 10:22:12 +09:00
oldextversions.sql pg_stat_statements: Add columns to track parallel worker activity 2024-10-09 08:30:45 +09:00
parallel.sql pg_stat_statements: Add columns to track parallel worker activity 2024-10-09 08:30:45 +09:00
planning.sql Revert support for improved tracking of nested queries 2025-06-12 10:08:55 +09:00
privileges.sql pg_stat_statements: Add regression test for privilege handling. 2024-07-24 20:54:51 +09:00
select.sql Fix query jumbling with GROUP BY clauses 2026-01-14 08:44:52 +09:00
squashing.sql pg_stat_statements: Fix handling of duplicate constant locations 2025-10-29 12:35:02 +01:00
user_activity.sql Add NOT NULL checking of pg_stat_statements_reset() in tests 2023-11-27 02:52:17 +02:00
utility.sql pg_stat_statements: Expand tests for SET statements 2024-09-25 10:04:44 +09:00
wal.sql Add NOT NULL checking of pg_stat_statements_reset() in tests 2023-11-27 02:52:17 +02:00