public function onDeleteArticle($oArticle)
    {
        $oDb = \OxidEsales\Eshop\Core\DatabaseProvider::getDb();
        $sIdQuoted = $oDb->quote($oArticle->getId());
        $oDb->execute("delete from oxseo where oxobjectid = $sIdQuoted and oxtype = 'oxarticle'");
        $oDb->execute("delete from oxobject2seodata where oxobjectid = $sIdQuoted");
        $oDb->execute("delete from oxseohistory where oxobjectid = $sIdQuoted");
    }