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

    [1] => Array
        (
            [sql] => SELECT c.cat_id, c.cat_name, c.measure_unit, c.parent_id, c.is_show, c.show_in_nav, c.grade, c.sort_order, COUNT(s.cat_id) AS has_children FROM `jcybuy`.`ecs_category` AS c LEFT JOIN `jcybuy`.`ecs_category` AS s ON s.parent_id=c.cat_id GROUP BY c.cat_id ORDER BY c.parent_id, c.sort_order ASC
        )

    [2] => Array
        (
            [error] => Out of memory (Needed 1570656 bytes)
        )

    [3] => Array
        (
            [errno] => 5
        )

)