From 3e8796f78188e193aac7386b38b7e17da3df5718 Mon Sep 17 00:00:00 2001
From: denkiryokuhatsuden <denkiryokuhatsuden+github@gmail.com>
Date: Tue, 2 Apr 2013 18:54:55 +0900
Subject: [PATCH] Add hidden field ordering for postgresql

In postgresql environment, when some hidden fields are used in orderBy clause,
they're not property added because $rsm->scalarMappings don't have information about them.
---
 .../Pagination/LimitSubqueryOutputWalker.php  | 20 ++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/lib/Doctrine/ORM/Tools/Pagination/LimitSubqueryOutputWalker.php b/lib/Doctrine/ORM/Tools/Pagination/LimitSubqueryOutputWalker.php
index 3943cb5e6..a0a22b03b 100644
--- a/lib/Doctrine/ORM/Tools/Pagination/LimitSubqueryOutputWalker.php
+++ b/lib/Doctrine/ORM/Tools/Pagination/LimitSubqueryOutputWalker.php
@@ -91,7 +91,25 @@ class LimitSubqueryOutputWalker extends SqlWalker
      */
     public function walkSelectStatement(SelectStatement $AST)
     {
-        $innerSql = parent::walkSelectStatement($AST);
+        if ($this->platform instanceof PostgreSqlPlatform) {
+            // Set every select expression as visible(hidden = false) to
+            // make $AST to have scalar mappings properly
+            $hiddens = array();
+            foreach ($AST->selectClause->selectExpressions as $idx => $expr) {
+                $hiddens[$idx] = $expr->hiddenAliasResultVariable;
+                $expr->hiddenAliasResultVariable = false;
+            }
+            
+            $innerSql = parent::walkSelectStatement($AST);
+    
+            // Restore hiddens
+            foreach ($AST->selectClause->selectExpressions as $idx => $expr) {
+                $expr->hiddenAliasResultVariable = $hiddens[$idx];
+            }
+        } else {
+            $innerSql = parent::walkSelectStatement($AST);
+        }
+
 
         // Find out the SQL alias of the identifier column of the root entity.
         // It may be possible to make this work with multiple root entities but that