From 05ea19a4bfef1b7493e23e24c4bb1740c600fb19 Mon Sep 17 00:00:00 2001
From: Tobias Schultze <webmaster@tubo-world.de>
Date: Tue, 8 Apr 2014 22:01:45 +0200
Subject: [PATCH] [HttpFoundation] use MERGE SQL for MS SQL Server session
 storage

---
 .../Session/Storage/Handler/PdoSessionHandler.php           | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
index 7021e1fb128b..67fb23a5f82c 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php
@@ -227,9 +227,15 @@ private function getMergeSql()
                 return "INSERT INTO $this->table ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time) " .
                     "ON DUPLICATE KEY UPDATE $this->dataCol = VALUES($this->dataCol), $this->timeCol = VALUES($this->timeCol)";
             case 'oci':
+                // DUAL is Oracle specific dummy table
                 return "MERGE INTO $this->table USING DUAL ON ($this->idCol = :id) " .
                     "WHEN NOT MATCHED THEN INSERT ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time) " .
                     "WHEN MATCHED THEN UPDATE SET $this->dataCol = :data";
+            case 'sqlsrv':
+                // MS SQL Server requires MERGE be terminated by semicolon
+                return "MERGE INTO $this->table USING (SELECT 'x' AS dummy) AS src ON ($this->idCol = :id) " .
+                    "WHEN NOT MATCHED THEN INSERT ($this->idCol, $this->dataCol, $this->timeCol) VALUES (:id, :data, :time) " .
+                    "WHEN MATCHED THEN UPDATE SET $this->dataCol = :data;";
         }
 
         return null;