From b103dff5f9f4de394ec047ae251696b66556336b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim=20D=C3=BCsterhus?= <timwolla@arcor.de>
Date: Sat, 3 Mar 2012 21:40:43 +0100
Subject: [PATCH] Adding For Update to query

---
 file/lib/data/chat/room/ChatRoomAction.class.php | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/file/lib/data/chat/room/ChatRoomAction.class.php b/file/lib/data/chat/room/ChatRoomAction.class.php
index c5afc37..7f70a58 100644
--- a/file/lib/data/chat/room/ChatRoomAction.class.php
+++ b/file/lib/data/chat/room/ChatRoomAction.class.php
@@ -34,15 +34,16 @@ public function create() {
 		$room = parent::create();
 		
 		WCF::getDB()->beginTransaction();
-		$sql = "SELECT	max(position) as max
-			FROM	wcf".WCF_N."_chat_room";
+		$sql = "SELECT		max(position) as max
+			FROM		wcf".WCF_N."_chat_room
+			FOR UPDATE";
 		$stmt = WCF::getDB()->prepareStatement($sql);
 		$stmt->execute();
 		$row = $stmt->fetchArray();
 		
-		$sql = "UPDATE wcf".WCF_N."_chat_room
-			SET position = ".($row['max'] + 1)."
-			WHERE roomID = ?";
+		$sql = "UPDATE	wcf".WCF_N."_chat_room
+			SET	position = ".($row['max'] + 1)."
+			WHERE	roomID = ?";
 		$stmt = WCF::getDB()->prepareStatement($sql);
 		$stmt->execute(array($room->roomID));
 		WCF::getDB()->commitTransaction();