DataProvider with date condition

$dataProvider2=new CActiveDataProvider('LongCourse', array(  
     'criteria'=>array(
        'condition'=>"DATE(t.course_show_date) >= DATE(NOW()) AND published=:published ",
        'params'=>array(':published'=>'Yes'),
 ),     
 'sort'=>array(
            'defaultOrder'=>'id DESC',
        ),
       'pagination'=>false,   
       ));