ecshop 多表删除

$sql = 'DELETE O, G
            FROM ' . $GLOBALS['ecs']->table('delivery_order') . ' AS O, ' . $GLOBALS['ecs']->table('delivery_goods') . ' AS G
            WHERE O.order_id = \'' . $order_id . '\'
            AND O.status =
            AND O.delivery_id = G.delivery_id';
    $query = $GLOBALS['db']->query($sql, 'SILENT');

    if ($query)
    {
        $return_res = ;
    }

    return $return_res;