DB_DataObject Bug in a select

I use mysql and would like to make a query that find the birthday of the member of my forum so i did $births = new DAO_Spb_user; $births->selectAs(array('user_id','user_nick')); $births->whereAdd("MONTH(user_birthday)","3"); $births->whereAdd("DAY(user_birthday)","27"); but this find nothing so i tried $births->query("select user_id,user_nick FROM user where MONTH(user_birthday) = '".date("m")."' AND DAY(user_birthday) = '".date("d")."'"); which find the data i searched. the question is , is it a bug ? or do i have to find another way to query the database in a more generic way to be able to make this search working on most of RDBMS ? regards. -- Founder Member of PhpFr.Org a PHP Portal for French Community http://phpfr.org