Save PathTargets for distinct/ordered relations in root->upper_targets[].

Etsuro Fujita · Etsuro Fujita · commit 3fdc374b5d24 · 2019-02-18T16:13:46.000+09:00
For the convenience of extensions, we previously only saved PathTargets for grouped, window, and final relations in root->upper_targets[] in grouping_planner(). To improve the convenience, save PathTargets for distinct and ordered relations as well. Author: Antonin Houska, with an additional change by me Discussion: https://postgr.es/m/10994.1549559088@localhost
diff --git a/src/backend/optimizer/plan/planner.c b/src/backend/optimizer/plan/planner.c
@@ -2035,6 +2035,8 @@ grouping_planner(PlannerInfo *root, bool inheritance_update,
 		 * of the corresponding upperrels might not be needed for this query.
 		 */
 		root->upper_targets[UPPERREL_FINAL] = final_target;
+		root->upper_targets[UPPERREL_ORDERED] = final_target;
+		root->upper_targets[UPPERREL_DISTINCT] = sort_input_target;
 		root->upper_targets[UPPERREL_WINDOW] = sort_input_target;
 		root->upper_targets[UPPERREL_GROUP_AGG] = grouping_target;
 
