From f0f73b316d3341c76ce776fd3f21bb7d1617570d Mon Sep 17 00:00:00 2001
From: "Thomas G. Lockhart" <lockhart@fourpalms.org>
Date: Mon, 13 Sep 1999 04:14:56 +0000
Subject: [PATCH] Allow CASE statement to contain *only* untyped result clauses
 or nulls.  Almost worked before, but forgot one place to check.  Reported by
 Tatsuo Ishii. Still does not do the right thing if inserting into a
 non-string target  column. Should look for a type coersion later, but
 doesn't.

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

diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index a2280a7451..ee9d307728 100644
--- a/src/backend/parser/parse_expr.c
+++ b/src/backend/parser/parse_expr.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.57 1999/08/25 23:21:34 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.58 1999/09/13 04:14:56 thomas Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -410,7 +410,8 @@ transformExpr(ParseState *pstate, Node *expr, int precedence)
 					 * only bother with conversion if not NULL and
 					 * different type...
 					 */
-					if (wtype && (wtype != ptype))
+					if (wtype && (wtype != UNKNOWNOID)
+						&& (wtype != ptype))
 					{
 						if (can_coerce_type(1, &wtype, &ptype))
 						{
-- 
2.40.0