From 65ff8de84599c626d32e1485593d1b59c06f9bb3 Mon Sep 17 00:00:00 2001 From: Robert Haas Date: Wed, 24 Sep 2025 11:21:55 -0400 Subject: [PATCH v8 2/3] Add planner_setup_hook and planner_shutdown_hook. These hooks allow plugins to get control at the earliest point at which the PlannerGlobal object is fully initialized, and then just before it gets destroyed. This is useful in combination with the extendable plan state facilities (see extendplan.h) and perhaps for other purposes as well. Reviewed-by: Andrei Lepikhov Reviewed-by: Tom Lane Discussion: http://postgr.es/m/CA+TgmoYWKHU2hKr62Toyzh-kTDEnMDeLw7gkOOnjL-TnOUq0kQ@mail.gmail.com --- src/backend/optimizer/plan/planner.c | 14 ++++++++++++++ src/include/optimizer/planner.h | 13 +++++++++++++ 2 files changed, 27 insertions(+) diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c index 8d1d45eab8d..b3c169d2b9e 100644 --- a/src/backend/optimizer/plan/planner.c +++ b/src/backend/optimizer/plan/planner.c @@ -73,6 +73,12 @@ bool enable_distinct_reordering = true; /* Hook for plugins to get control in planner() */ planner_hook_type planner_hook = NULL; +/* Hook for plugins to get control after PlannerGlobal is initialized */ +planner_setup_hook_type planner_setup_hook = NULL; + +/* Hook for plugins to get control before PlannerGlobal is discarded */ +planner_shutdown_hook_type planner_shutdown_hook = NULL; + /* Hook for plugins to get control when grouping_planner() plans upper rels */ create_upper_paths_hook_type create_upper_paths_hook = NULL; @@ -457,6 +463,10 @@ standard_planner(Query *parse, const char *query_string, int cursorOptions, tuple_fraction = 0.0; } + /* Allow plugins to take control after we've initialized "glob" */ + if (planner_setup_hook) + (*planner_setup_hook) (glob, parse, query_string, &tuple_fraction, es); + /* primary planning entry point (may recurse for subqueries) */ root = subquery_planner(glob, parse, NULL, NULL, false, tuple_fraction, NULL); @@ -636,6 +646,10 @@ standard_planner(Query *parse, const char *query_string, int cursorOptions, result->jitFlags |= PGJIT_DEFORM; } + /* Allow plugins to take control before we discard "glob" */ + if (planner_shutdown_hook) + (*planner_shutdown_hook) (glob, parse, query_string, result); + if (glob->partition_directory != NULL) DestroyPartitionDirectory(glob->partition_directory); diff --git a/src/include/optimizer/planner.h b/src/include/optimizer/planner.h index c7ab466f5f1..55d9b7940aa 100644 --- a/src/include/optimizer/planner.h +++ b/src/include/optimizer/planner.h @@ -32,6 +32,19 @@ typedef PlannedStmt *(*planner_hook_type) (Query *parse, ExplainState *es); extern PGDLLIMPORT planner_hook_type planner_hook; +/* Hook for plugins to get control after PlannerGlobal is initialized */ +typedef void (*planner_setup_hook_type) (PlannerGlobal *glob, Query *parse, + const char *query_string, + double *tuple_fraction, + ExplainState *es); +extern PGDLLIMPORT planner_setup_hook_type planner_setup_hook; + +/* Hook for plugins to get control before PlannerGlobal is discarded */ +typedef void (*planner_shutdown_hook_type) (PlannerGlobal *glob, Query *parse, + const char *query_string, + PlannedStmt *pstmt); +extern PGDLLIMPORT planner_shutdown_hook_type planner_shutdown_hook; + /* Hook for plugins to get control when grouping_planner() plans upper rels */ typedef void (*create_upper_paths_hook_type) (PlannerInfo *root, UpperRelationKind stage, -- 2.50.1 (Apple Git-155)