Remove unnecessary clauses_attnums variable

tvondra · tvondra · commit 6d61c3f1cb71 · 2019-11-28T23:25:14.000+01:00
Commit c676e65 reworked how choose_best_statistics() picks the best extended statistics, but failed to remove clauses_attnums which is now unnecessary. So get rid of it and backpatch to 12, same as c676e65. Author: Tomas Vondra Discussion: https://postgr.es/m/CA+u7OA7H5rcE2=8f263w4NZD6ipO_XOrYB816nuLXbmSTH9pQQ@mail.gmail.com Backpatch-through: 12
diff --git a/src/backend/statistics/extended_stats.c b/src/backend/statistics/extended_stats.c
@@ -1206,7 +1206,6 @@ statext_mcv_clauselist_selectivity(PlannerInfo *root, List *clauses, int varReli
 								   RelOptInfo *rel, Bitmapset **estimatedclauses)
 {
 	ListCell   *l;
-	Bitmapset  *clauses_attnums = NULL;
 	Bitmapset **list_attnums;
 	int			listidx;
 	StatisticExtInfo *stat;
@@ -1244,10 +1243,7 @@ statext_mcv_clauselist_selectivity(PlannerInfo *root, List *clauses, int varReli
 
 		if (!bms_is_member(listidx, *estimatedclauses) &&
 			statext_is_compatible_clause(root, clause, rel->relid, &attnums))
-		{
 			list_attnums[listidx] = attnums;
-			clauses_attnums = bms_add_members(clauses_attnums, attnums);
-		}
 		else
 			list_attnums[listidx] = NULL;
 
