Index: Doctrine/Connection/Mssql.php
===================================================================
--- Doctrine/Connection/Mssql.php	(revision 6859)
+++ Doctrine/Connection/Mssql.php	(working copy)
@@ -164,11 +164,11 @@
                     $helper_string = stristr($query, $orders[$i]);
 
                     $from_clause_pos = strpos($helper_string, ' FROM ');
-                    $fields_string = substr($helper_string, 0, $from_clause_pos + 1);
+                    $fieldsString = substr($helper_string, 0, $from_clause_pos + 1);
 
-                    $field_array = explode(',', $fields_string);
-                    $field_array = array_shift($field_array);
-                    $aux2 = spliti(' as ', $field_array);
+                    $fieldArray = explode(',', $fieldsString);
+                    $fieldArray = array_shift($fieldArray);
+                    $aux2 = spliti(' as ', $fieldArray);
                     $aux2 = explode('.', end($aux2));
 
                     $aliases[$i] = trim(end($aux2));
@@ -184,13 +184,27 @@
                 $selectReplace .= 'DISTINCT ';
             }
 
-            $fields_string = substr($query, strlen($selectReplace), strpos($query, ' FROM ') - strlen($selectReplace));
-            $field_array = explode(',', $fields_string);
-            $aux2 = explode('.', $field_array[0]);
-            $key_field = trim(end($aux2));
+            $fieldsString = substr($query, strlen($selectReplace), strpos($query, ' FROM ') - strlen($selectReplace));
+            $fieldArray = explode(',', $fieldsString);
+			
+			// check if first field is in form "x as y"
+			if (stripos($fieldArray[0], 'as') !== false)
+			{
+				// detect split string: as or AS
+				$split = strpos($fieldArray[0], 'as') !== false ? 'as' : 'AS';
+				
+				// split into array('x', 'y')
+				$aux2 = explode($split, $fieldArray[0]);
+			} else {
+				// field must be in form "x.y"
+				// split into array('x', 'y')
+				$aux2 = explode('.', $fieldArray[0]);
+			}
+				
+            $keyField = trim(end($aux2));
 
             $query = preg_replace('/^'.$selectRegExp.'/i', $selectReplace . 'TOP ' . ($count + $offset) . ' ', $query);
-            $query = 'SELECT TOP ' . $count . ' ' . $this->quoteIdentifier('inner_tbl') . '.' . $key_field . ' FROM (' . $query . ') AS ' . $this->quoteIdentifier('inner_tbl');
+            $query = 'SELECT TOP ' . $count . ' ' . $this->quoteIdentifier('inner_tbl') . '.' . $keyField . ' FROM (' . $query . ') AS ' . $this->quoteIdentifier('inner_tbl');
 
             if ($orderby !== false) {
                 $query .= ' ORDER BY ';