Avoid generating excess (and illegal) parentheses around an aliased JOIN

in prettyprint mode.  Andreas Pflug

src/backend/utils/adt/ruleutils.c

@@ -3,7 +3,7 @@
  *				back to source text
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.186 2004/12/11 23:26:45 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.187 2004/12/13 00:33:06 tgl Exp $
  *
  *	  This software is copyrighted by Jan Wieck - Hamburg.
  *
@@ -3903,7 +3903,8 @@ get_from_clause_item(Node *jtnode, Query *query, deparse_context *context)
 		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, '(');