Per SQL spec (in particular, the grammar in SQL:2008 7.13) we should allow

tglsfdc · tglsfdc · commit 869312e65e38 · 2009-07-06T02:58:40.000Z
parentheses around the &lt;query expression body&gt; 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
@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.665 2009/06/18 01:27:02 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.666 2009/07/06 02:58:40 tgl Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -6879,7 +6879,7 @@ select_no_parens:
 										NULL);
 					$$ = $1;
 				}
-			| with_clause simple_select
+			| with_clause select_clause
 				{
 					insertSelectOptions((SelectStmt *) $2, NULL, NIL,
 										NULL, NULL,

Original file line number	Diff line number	Diff line change
`@@ -11,7 +11,7 @@`
`11`	`11`	`*`
`12`	`12`	`*`
`13`	`13`	`* IDENTIFICATION`
`14`		`- * $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.665 2009/06/18 01:27:02 tgl Exp $`
	`14`	`+ * $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.666 2009/07/06 02:58:40 tgl Exp $`
`15`	`15`	`*`
`16`	`16`	`* HISTORY`
`17`	`17`	`* AUTHOR DATE MAJOR EVENT`
`@@ -6879,7 +6879,7 @@ select_no_parens:`
`6879`	`6879`	`NULL);`
`6880`	`6880`	`$$ = $1;`
`6881`	`6881`	`}`
`6882`		`- \| with_clause simple_select`
	`6882`	`+ \| with_clause select_clause`
`6883`	`6883`	`{`
`6884`	`6884`	`insertSelectOptions((SelectStmt *) $2, NULL, NIL,`
`6885`	`6885`	`NULL, NULL,`