protected function UpdateMainScroeValue()
    {
        $bRet = false;
        $sQuery = " SELECT AVG( `score` ) AS main_score FROM `pkg_shop_rating_service_rating` WHERE `pkg_shop_rating_service_id` = '".$this->id."' ";
        $rs = MySqlLegacySupport::getInstance()->query($sQuery);
        if ($rs) {
            $oAVG = MySqlLegacySupport::getInstance()->fetch_object($rs);
        }

        //Update value
        if ($oAVG->main_score > 0) {
            $sQuery = "UPDATE pkg_shop_rating_service SET current_rating = '".$oAVG->main_score."', current_rating_date = NOW() WHERE id = '".$this->id."' ";
            MySqlLegacySupport::getInstance()->query($sQuery);
            $bRet = $oAVG->main_score;
        }

        return $bRet;
    }