public function loadRDFaDeliverySetList($sDelId = null)
    {
        $sTable = getViewName('oxdeliveryset');
        if ($sDelId) {
            $oDb = \OxidEsales\Eshop\Core\DatabaseProvider::getDb();
            $sSubSql = "( select $sTable.* from $sTable left join oxdel2delset on oxdel2delset.oxdelsetid=$sTable.oxid where " . $this->getBaseObject()->getSqlActiveSnippet() . " and oxdel2delset.oxdelid = " . $oDb->quote($sDelId) . " ) as $sTable";
        } else {
            $sSubSql = $sTable;
        }
        $sQ = "select $sTable.*, oxobject2delivery.oxobjectid from $sSubSql left join (select oxobject2delivery.* from oxobject2delivery where oxobject2delivery.oxtype = 'rdfadeliveryset' ) as oxobject2delivery on oxobject2delivery.oxdeliveryid=$sTable.oxid where " . $this->getBaseObject()->getSqlActiveSnippet() . " ";
        $this->selectString($sQ);
    }