<?php 
// +----------------------------------------------------------------------+
// | ThinkPHP                                                             |
// +----------------------------------------------------------------------+
// | Copyright (c) 2006~2007 http://thinkphp.cn All rights reserved.      |
// +----------------------------------------------------------------------+
// | Licensed under the Apache License, Version 2.0 (the 'License');      |
// | you may not use this file except in compliance with the License.     |
// | You may obtain a copy of the License at                              |
// | http://www.apache.org/licenses/LICENSE-2.0                           |
// | Unless required by applicable law or agreed to in writing, software  |
// | distributed under the License is distributed on an 'AS IS' BASIS,    |
// | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or      |
// | implied. See the License for the specific language governing         |
// | permissions and limitations under the License.                       |
// +----------------------------------------------------------------------+
// | Author: liu21st <liu21st@gmail.com>                                  |
// +----------------------------------------------------------------------+
// $Id$

/**
 +------------------------------------------------------------------------------
 * 鏁版嵁搴撶被鍨嬬紦瀛樼被
     CREATE TABLE THINK_CACHE (
       id int(11) unsigned NOT NULL auto_increment,
       cachekey varchar(255) NOT NULL,
       expire int(11) NOT NULL,
       data blob,
       datasize int(11),
       datacrc int(32),
       PRIMARY KEY (id)
     );
 +------------------------------------------------------------------------------
 * @category   Think
 * @package  Think
 * @subpackage  Util
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id$
 +------------------------------------------------------------------------------
 */
class CacheDb extends Cache
{//綾誨畾涔夊紑濮