private function getIntegerSQLDeclarationSnippet(array $options = array())
    {
        $length = isset($options['length']) ? (int) $options['length'] : null;
        $unsigned = isset($options['unsigned']) && $options['unsigned'] ? ' UNSIGNED' : null;
        $autoIncrement = isset($options['auto_increment']) && $options['auto_increment'] ? ' AUTO_INCREMENT' : null;

        $sql = $unsigned.$autoIncrement;

        if ($length !== null) {
            $sql = '('.$length.')'.$sql;
        }

        return $sql;
    }