MySQL server error report:Array
(
    [0] => Array
        (
            [message] => MySQL Query Error
        )

    [1] => Array
        (
            [sql] => select rc.recommend_type from `coffee_master`.`yp_category` as c left join `coffee_master`.`yp_cat_recommend` as rc on c.cat_id = rc.cat_id where c.cat_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
        )

)