From 9a20dfd04a9dcd14beaf13773a6d1b695b67e36f Mon Sep 17 00:00:00 2001 From: Alexander Korotkov Date: Tue, 18 Jun 2024 15:08:17 +0300 Subject: [PATCH v3] Add doc entry for the new GUC paramenter enable_group_by_reordering 0452b461bc4 adds alternative orderings of group-by keys during the query optimization. This new feature is controlled by the new GUC parameter enable_group_by_reordering, which accidentally came without the documentation. This commit adds the missing documentation for that GUC. Reported-by: Bruce Momjian Discussion: https://postgr.es/m/ZnDx2FYlba_OafQd%40momjian.us Author: Andrei Lepikhov --- doc/src/sgml/config.sgml | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index 698169afdb6..0c7a9082c54 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -5341,6 +5341,25 @@ ANY num_sync ( + enable_group_by_reordering (boolean) + + enable_group_by_reordering configuration parameter + + + + + Controls if the query planner will produce a plan which will provide + GROUP BY keys sorted in the order of keys of + a child node of the plan, such as an index scan. When disabled, the + query planner will produce a plan with GROUP BY + keys only sorted to match the ORDER BY clause, + if any. When enabled, the planner will try to produce a more + efficient plan. The default value is on. + + + + enable_hashagg (boolean) -- 2.39.3 (Apple Git-145)