TDbTransaction class file

• version: $Id: TDbTransaction.php 1550 2006-12-03 23:14:20Z xue $
• license: http://www.pradosoft.com/license/
• copyright: Copyright © 2006 PradoSoft
• link: http://www.pradosoft.com/
• author: Qiang Xue <qiang.xue@gmail.com>