public function getClientVersion()
    {
        $this->_connect();

        $version  = $this->_connection->server_version;
        $major    = (int)($version / 10000);
        $minor    = (int)($version % 10000 / 100);
        $revision = (int)($version % 100);

        return $major . '.' . $minor . '.' . $revision;
    }