diff options
Diffstat (limited to 'src/backend/optimizer')
| -rw-r--r-- | src/backend/optimizer/plan/planner.c | 26 | ||||
| -rw-r--r-- | src/backend/optimizer/prep/prepjointree.c | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c index f3a0a44fd88..d11f44e64d5 100644 --- a/src/backend/optimizer/plan/planner.c +++ b/src/backend/optimizer/plan/planner.c @@ -62,6 +62,9 @@ int force_parallel_mode = FORCE_PARALLEL_OFF; /* Hook for plugins to get control in planner() */ planner_hook_type planner_hook = NULL; +/* Hook for plugins to get control before grouping_planner plans upper rels */ +create_upper_paths_hook_type create_upper_paths_hook = NULL; + /* Expression kind codes for preprocess_expression */ #define EXPRKIND_QUAL 0 @@ -459,6 +462,7 @@ subquery_planner(PlannerGlobal *glob, Query *parse, root->append_rel_list = NIL; root->rowMarks = NIL; memset(root->upper_rels, 0, sizeof(root->upper_rels)); + memset(root->upper_targets, 0, sizeof(root->upper_targets)); root->processed_tlist = NIL; root->grouping_map = NULL; root->minmax_aggs = NIL; @@ -1737,6 +1741,28 @@ grouping_planner(PlannerInfo *root, bool inheritance_update, } /* + * Save the various upper-rel PathTargets we just computed into + * root->upper_targets[]. The core code doesn't use this, but it + * provides a convenient place for extensions to get at the info. For + * consistency, we save all the intermediate targets, even though some + * of the corresponding upperrels might not be needed for this query. + */ + root->upper_targets[UPPERREL_FINAL] = final_target; + root->upper_targets[UPPERREL_WINDOW] = sort_input_target; + root->upper_targets[UPPERREL_GROUP_AGG] = grouping_target; + + /* + * Let extensions, particularly CustomScan providers, consider + * injecting extension Paths into the query's upperrels, where they + * will compete with the Paths we create below. We pass the final + * scan/join rel because that's not so easily findable from the + * PlannerInfo struct; anything else the hook wants to know should be + * obtainable via "root". + */ + if (create_upper_paths_hook) + (*create_upper_paths_hook) (root, current_rel); + + /* * If we have grouping and/or aggregation, consider ways to implement * that. We build a new upperrel representing the output of this * phase. diff --git a/src/backend/optimizer/prep/prepjointree.c b/src/backend/optimizer/prep/prepjointree.c index c8d5c66b396..75577bce2ca 100644 --- a/src/backend/optimizer/prep/prepjointree.c +++ b/src/backend/optimizer/prep/prepjointree.c @@ -909,6 +909,7 @@ pull_up_simple_subquery(PlannerInfo *root, Node *jtnode, RangeTblEntry *rte, subroot->append_rel_list = NIL; subroot->rowMarks = NIL; memset(subroot->upper_rels, 0, sizeof(subroot->upper_rels)); + memset(subroot->upper_targets, 0, sizeof(subroot->upper_targets)); subroot->processed_tlist = NIL; subroot->grouping_map = NULL; subroot->minmax_aggs = NIL; |