$regvest = $_GET["reg"];

           $criteria = new CDbCriteria;
//           $criteria->distinct = true;
           $criteria->select = "t.*";
           $criteria->join = "JOIN tbl_coupon_terminal ON tbl_coupon_terminal.id_coupon = t.id";
           $criteria->condition = "public_status = 2 AND t.coupon_name LIKE $regvest";

              $dataProvider = new CActiveDataProvider('Coupon', array(
                'criteria' => $criteria,
                'pagination'=>array(
                        'pageSize'=>12,
                ))
                );