From 4213e44a0ba3413b7a8fee65684bf637c6b83d37 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Fri, 12 Sep 1997 22:07:59 +0000
Subject: [PATCH] Fix for select null, "fail" from pg_am from Patrick van Kleef

---
 src/backend/nodes/copyfuncs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index ef6c1a1828..19515ac026 100644
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.10 1997/09/08 21:43:57 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.11 1997/09/12 22:07:59 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -725,7 +725,7 @@ _copyConst(Const *from)
 	 *	puts in the right values here.
 	 * ----------------
 	 */
-	if (cached_type != from->consttype)
+	if (!from->constisnull && cached_type != from->consttype) {
 	{
 		HeapTuple	typeTuple;
 		TypeTupleForm typeStruct;