Index: ruleutils.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v
retrieving revision 1.185
diff -u -r1.185 ruleutils.c
--- ruleutils.c	5 Nov 2004 19:16:11 -0000	1.185
+++ ruleutils.c	10 Dec 2004 13:41:17 -0000
@@ -3876,7 +3876,8 @@
 		bool		need_paren_on_right;
 
 		need_paren_on_right = PRETTY_PAREN(context) &&
-			!IsA(j->rarg, RangeTblRef);
+		  !IsA(j->rarg, RangeTblRef) && 
+		  !(IsA(j->rarg, JoinExpr) && ((JoinExpr*)j->rarg)->alias != NULL);
 
 		if (!PRETTY_PAREN(context) || j->alias != NULL)
 			appendStringInfoChar(buf, '(');