Call to a member function fetch() on array

Я новичок, подскажите пожайлуйста - в чем тут ошибка?

public static function getAdminEmails()
{
    // Запрос к БД
    $result = DB::select('select * from admin_emails');
    print_r($result);
    $i = 0;
    $email = array();
    while ($row = $result->fetch()) {
        $email[$i]['id'] = $row['id'];
        $email[$i]['name'] = $row['name'];
        $email[$i]['value'] = $row['value'];
        $email[$i]['created_at'] = $row['created_at'];
        $email[$i]['updated_at'] = $row['updated_at'];
        $i++;
    }
    return $email;
}