MySQL ERROR

Error Number: 1064

Description: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') ORDER BY `p`.`sort_priority` DESC, `p`.`name_ru` ASC LIMIT 0,15' at line 1

Query: SELECT `p`.`product_id`, `p`.`name_ru` AS `name`, `p`.`price`, `p`.`sale_price`, `p`.`postdate` FROM `mg_products` AS `p` WHERE `p`.`hide`='' AND `p`.`product_id` IN () ORDER BY `p`.`sort_priority` DESC, `p`.`name_ru` ASC LIMIT 0,15