App\Controller\Db::codb PHP Method

    function codb()
    {
        $ret1 = $this->codb->query("show tables");
        $ret2 = $this->codb->query("desc user_login");
        $this->codb->wait(1.0);
        var_dump($ret1->result->fetchall());
        var_dump($ret2->result->fetchall());
    }