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<?php /** * @link https://www.yiiframework.com/ * @copyright Copyright (c) 2008 Yii Software LLC * @license https://www.yiiframework.com/license/ */ namespace yii\db; /** * CheckConstraint represents the metadata of a table `CHECK` constraint. * * @author Sergey Makinen <sergey@makinen.ru> * @since 2.0.13 */ class CheckConstraint extends Constraint { /** * @var string the SQL of the `CHECK` constraint. */ public $expression; }