Call to a member function fetch() on array

Question

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;

}