From 6c1abf0d3c41259d93a6cacb0020195e8fe907b1 Mon Sep 17 00:00:00 2001
From: "Thomas G. Lockhart" <lockhart@fourpalms.org>
Date: Wed, 18 Feb 1998 07:19:34 +0000
Subject: [PATCH] Fix from Vadim for simple-minded case SELECT 1 WHERE 1 IN
 (SELECT 1)  used in regression tests. No longer core dumps.

---
 src/backend/executor/nodeResult.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/backend/executor/nodeResult.c b/src/backend/executor/nodeResult.c
index 7dcb9376ca..8c2edfd44a 100644
--- a/src/backend/executor/nodeResult.c
+++ b/src/backend/executor/nodeResult.c
@@ -27,7 +27,7 @@
  *				   SeqScan (emp.all)
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeResult.c,v 1.6 1998/02/13 03:26:52 vadim Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/executor/nodeResult.c,v 1.7 1998/02/18 07:19:34 thomas Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -291,7 +291,8 @@ ExecReScanResult(Result *node, ExprContext *exprCtxt, Plan *parent)
 	 * if chgParam of subnode is not null then plan
 	 * will be re-scanned by first ExecProcNode.
 	 */
-	if (((Plan*) node)->lefttree->chgParam == NULL)
+	if (((Plan*) node)->lefttree && 
+			((Plan*) node)->lefttree->chgParam == NULL)
 		ExecReScan (((Plan*) node)->lefttree, exprCtxt, (Plan *) node);
 	
 }
-- 
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