Interface yii\db\ExpressionInterface
| Implemented by | yii\db\ActiveQuery, yii\db\ArrayExpression, yii\db\Expression, yii\db\JsonExpression, yii\db\PdoValue, yii\db\Query, yii\db\conditions\ConditionInterface, yii\sphinx\ActiveQuery, yii\sphinx\Query |
|---|---|
| Available since version | 2.0.14 |
| Source Code | https://github.com/yiisoft/yii2/blob/master/framework/db/ExpressionInterface.php |
Interface ExpressionInterface should be used to mark classes, that should be built in a special way.
The database abstraction layer of Yii framework supports objects that implement this interface and will use yii\db\ExpressionBuilderInterface to build them.
The default implementation is a class yii\db\Expression.