www.gusucode.com > 24Beta 虚拟主机版 1.0.0 Beta源码程序 > 24Beta 虚拟主机版 1.0.0 Beta源码程序/24Beta-1.0.0-vhost/library/framework/db/schema/CDbExpression.php
<?php /** * CDbExpression class file. * * @author Qiang Xue <qiang.xue@gmail.com> * @link http://www.yiiframework.com/ * @copyright Copyright © 2008-2009 Yii Software LLC * @license http://www.yiiframework.com/license/ */ /** * CDbExpression represents a DB expression that does not need escaping. * CDbExpression is mainly used in {@link CActiveRecord} as attribute values. * When inserting or updating a {@link CActiveRecord}, attribute values of * type CDbExpression will be directly put into the corresponding SQL statement * without escaping. A typical usage is that an attribute is set with 'NOW()' * expression so that saving the record would fill the corresponding column * with the current DB server timestamp. * * @author Qiang Xue <qiang.xue@gmail.com> * @version $Id: CDbExpression.php 544 2009-01-18 13:27:31Z qiang.xue $ * @package system.db.schema * @since 1.0.2 */ class CDbExpression extends CComponent { /** * @var string the DB expression */ public $expression; /** * Constructor. * @param string the DB expression */ public function __construct($expression) { $this->expression=$expression; } /** * String magic method * @return string the DB expression */ public function __toString() { return $this->expression; } }