Tweak the order of processing of WITH clauses so that they are processed

before we start analyzing the parent statement.  This is to make it
more clear that the WITH isn't affected by anything in the parent.
I don't believe there's any actual bug here, because the stuff that
was being done before WITH didn't affect subqueries; but it's certainly
a potential for error (and apparently misled Marko into committing some
real errors...).

src/backend/parser/analyze.c

@@ -17,7 +17,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- *	$PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.400 2010/01/15 22:36:33 tgl Exp $
+ *	$PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.401 2010/02/12 22:48:56 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -783,19 +783,19 @@ transformSelectStmt(ParseState *pstate, SelectStmt *stmt)
 
 	qry->commandType = CMD_SELECT;
 
-	/* make FOR UPDATE/FOR SHARE info available to addRangeTableEntry */
-	pstate->p_locking_clause = stmt->lockingClause;
-
-	/* make WINDOW info available for window functions, too */
-	pstate->p_windowdefs = stmt->windowClause;
-
-	/* process the WITH clause */
+	/* process the WITH clause independently of all else */
 	if (stmt->withClause)
 	{
 		qry->hasRecursive = stmt->withClause->recursive;
 		qry->cteList = transformWithClause(pstate, stmt->withClause);
 	}
 
+	/* make FOR UPDATE/FOR SHARE info available to addRangeTableEntry */
+	pstate->p_locking_clause = stmt->lockingClause;
+
+	/* make WINDOW info available for window functions, too */
+	pstate->p_windowdefs = stmt->windowClause;
+
 	/* process the FROM clause */
 	transformFromClause(pstate, stmt->fromClause);
 
@@ -929,7 +929,7 @@ transformValuesClause(ParseState *pstate, SelectStmt *stmt)
 	Assert(stmt->windowClause == NIL);
 	Assert(stmt->op == SETOP_NONE);
 
-	/* process the WITH clause */
+	/* process the WITH clause independently of all else */
 	if (stmt->withClause)
 	{
 		qry->hasRecursive = stmt->withClause->recursive;
@@ -1149,6 +1149,13 @@ transformSetOperationStmt(ParseState *pstate, SelectStmt *stmt)
 
 	qry->commandType = CMD_SELECT;
 
+	/* process the WITH clause independently of all else */
+	if (stmt->withClause)
+	{
+		qry->hasRecursive = stmt->withClause->recursive;
+		qry->cteList = transformWithClause(pstate, stmt->withClause);
+	}
+
 	/*
 	 * Find leftmost leaf SelectStmt; extract the one-time-only items from it
 	 * and from the top-level node.
@@ -1188,13 +1195,6 @@ transformSetOperationStmt(ParseState *pstate, SelectStmt *stmt)
 				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
 				 errmsg("SELECT FOR UPDATE/SHARE is not allowed with UNION/INTERSECT/EXCEPT")));
 
-	/* process the WITH clause */
-	if (stmt->withClause)
-	{
-		qry->hasRecursive = stmt->withClause->recursive;
-		qry->cteList = transformWithClause(pstate, stmt->withClause);
-	}
-
 	/*
 	 * Recursively transform the components of the tree.
 	 */