Quoted DB expression when used in param

[yii-bot]

This issue has originally been reported by @klevron at https://github.com/yiisoft/yii2/issues/6382. Moved here by @cebe.

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Hello

DB Expression is quoted when used in param, e.g.

MyModel::deleteAll("expire < :expire", [':expire' => new Expression('NOW()')]);

This will make the following query :

DELETE FROM `expire` WHERE expire < 'NOW()';

Be careful, debug tool will log the correct one :

DELETE FROM `expire` WHERE expire < NOW();

http://stackoverflow.com/questions/27312579/odd-behavior-of-now-and-db-expression-in-yii2-mysql