DataObject and update()

Hi all I allways wondering about the generated update sql strings from Dataobject. Even I changed one column in the table, all columns are included in the update sql string. Then I saw in the source from Dataobject.php function update() the follwing code: // dont write things that havent changed.. if (($dataObject !== false) && isset($dataObject->$k) && ($dataObject->$k == $this->$k)) { continue; } So, I tried this: $do_herde_kosten_old = clone $do_herde_kosten; $do_herde_kosten->setFrom($values,'frm_%s'); $do_herde_kosten->update($do_herde_kosten_old); and it works, only the changed columns are in the update SQL. But is this the right way? Shouldn't update() do this by it self? And for what else should the update() parameter be usefully? Marco _____________________________________________________________ Neu! sunrise SMS-Abos mit bis zu 250 SMS monatlich inklusive. http://www.sunrise.ch/message