From: Teodor Sigaev <teodor@sigaev.ru>
Date: Sun, 8 Apr 2018 16:58:15 +0000 (+0300)
Subject: match_clause_to_index should check only key columns
X-Git-Url: http://git.postgresql.org/gitweb/-?a=commitdiff_plain;h=02f3e558f21c0fbec9f94d5de9ad34f321eb0e57;p=users%2Frhaas%2Fpostgres.git

match_clause_to_index should check only key columns

Alexander Korotkov per gripe from Tom Lane noticed on valgrind-enabled
buildfarm members
---

diff --git a/src/backend/optimizer/path/indxpath.c b/src/backend/optimizer/path/indxpath.c
index cc607dcdfa..bf42b54970 100644
--- a/src/backend/optimizer/path/indxpath.c
+++ b/src/backend/optimizer/path/indxpath.c
@@ -2244,8 +2244,8 @@ match_clause_to_index(IndexOptInfo *index,
 	if (!restriction_is_securely_promotable(rinfo, index->rel))
 		return;
 
-	/* OK, check each index column for a match */
-	for (indexcol = 0; indexcol < index->ncolumns; indexcol++)
+	/* OK, check each index key column for a match */
+	for (indexcol = 0; indexcol < index->nkeycolumns; indexcol++)
 	{
 		if (match_clause_to_indexcol(index,
 									 indexcol,