From: Thomas G. Lockhart <lockhart@fourpalms.org>
Date: Mon, 13 Sep 1999 04:21:21 +0000 (+0000)
Subject: Allow CASE statement to contain *only* untyped result clauses or nulls.
X-Git-Tag: REL6_5_2~8
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=400676afc9ca70c0f31d4d83a5037ac5f5539c4c;p=thirdparty%2Fpostgresql.git

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.
---

diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index 4aecd1f0481..955765ffb39 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 1.50 1999/07/11 02:04:19 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.50.2.1 1999/09/13 04:21:21 thomas Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -467,7 +467,8 @@ 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))
 						{