/**
  * Update existing entry
  */
 protected function update(ilSearchCommandQueueElement $element)
 {
     global $ilDB;
     $query = "UPDATE search_command_queue " . "SET command = " . $ilDB->quote($element->getCommand(), 'text') . ", " . "last_update = " . $ilDB->now() . ", " . "finished = " . $ilDB->quote(0, 'integer') . " " . "WHERE obj_id = " . $ilDB->quote($element->getObjId(), 'integer') . " " . "AND obj_type = " . $ilDB->quote($element->getObjType(), 'text');
     $res = $ilDB->manipulate($query);
     return true;
 }