mysql-购物车结算报错的问题

<code> MySQL server error report:Array ( [0] => Array ( [message] => MySQL Query Error ) [1] => Array ( [sql] => SELECT *FROM `rishengxjd`.`ecs_favourable_activity` WHERE start_time = '1420966015' AND CONCAT(',', user_rank, ',') LIKE '%,2,%' AND act_type IN ('2','1') AND supplier_id= ) [2] => Array ( [error] => 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 '' at line 1 ) [3] => Array ( [errno] => 1064 ) )</code>