From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 6 Jul 2009 02:58:40 +0000 (+0000)
Subject: Per SQL spec (in particular, the grammar in SQL:2008 7.13) we should allow
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Per SQL spec (in particular, the grammar in SQL:2008 7.13) we should allow
parentheses around the <query expression body> that follows a WITH clause, eg
	with cte(foo) as ( values(0) ) ((select foo from cte));
This seems to be just an oversight/thinko in gram.y.  Noted while
experimenting with bug #4902.
---

diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index ac17b93bf6..20ab0bac2a 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -6879,7 +6879,7 @@ select_no_parens:
 										NULL);
 					$$ = $1;
 				}
-			| with_clause simple_select
+			| with_clause select_clause
 				{
 					insertSelectOptions((SelectStmt *) $2, NULL, NIL,
 										NULL, NULL,