SQL查询如何调用枚举？

How would i go about trying to call enum value from SQL for my SQL Query below if someone could assist and point me in the right direction it would be great.

$insertLogSQL = $odb -> prepare("INSERT INTO `logs` 
    VALUES (NULL, :user, :ip, :port, :time, :method, UNIX_TIMESTAMP(), :stopped, :server)");

$insertLogSQL -> execute(array(
    ':user' => $_SESSION['username'], 
    ':ip' => $host, 
    ':port' => $port, 
    ':time' => $time, 
    ':method' => $method, 
    ':stopped' => 0, 
    ':server' => )
);

My code work fine i'm just trying to implement server rotation but wouldn't know how to go about enum ?