code: public function fetchData()
    {
      $this->recordSet = $this->search_obj->getRecordsetFromObjectQuery($this->extra,$this->limit,$this->offset);
      // check if recordSet instanceof ADORecordSet, to prevent PHP Fatal error and create a usefull exception with backtrace
      if (!($this->recordSet instanceof ADORecordSet))
      {
        throw new Exception("Web2All_Table_ObjectBaselist->fetchData(): recordSet is not instanceof ADORecordSet",E_USER_ERROR);
      }
    }
docs: fetch all data from the database
  
  NOTE: whoever extends this method, is responsible for closing the recordSet