From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Tue, 14 Sep 1999 20:26:02 +0000 (+0000)
Subject: Last-minute fix for 6.5.2: repair optimizer coredump on
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=5532d0e11cce057b7d69ee694e19d0a7e01adedb;p=users%2Fbernd%2Fpostgres.git

Last-minute fix for 6.5.2: repair optimizer coredump on
CASE clauses in WHERE.  Surprised no one noticed this before.
---

diff --git a/src/backend/optimizer/path/indxpath.c b/src/backend/optimizer/path/indxpath.c
index 45e5a292fd..e292d31161 100644
--- a/src/backend/optimizer/path/indxpath.c
+++ b/src/backend/optimizer/path/indxpath.c
@@ -585,12 +585,13 @@ match_clause_to_indexkey(RelOptInfo *rel,
 	Oid			restrict_op = InvalidOid;
 	bool		isIndexable = false;
 
-	if (or_clause((Node *) clause) ||
-		not_clause((Node *) clause) || single_node((Node *) clause))
-		return (RestrictInfo *) NULL;
-
+	/* Clause must be a binary opclause. */
+	if (! is_opclause((Node *) clause))
+		return NULL;
 	leftop = get_leftop(clause);
 	rightop = get_rightop(clause);
+	if (! leftop || ! rightop)
+		return NULL;
 
 	/*
 	 * If this is not a join clause, check for clauses of the form: