[Zope] select age(birthday) from web_users

Hi, Query in the topic from postgresql database returns from psql line, years, months and days. From testing same query in zope i get only days, is there a way to force it to return as psql does return it? As in: brain_dev=# select age(birthday) from web_users; age ------------------------ 13 years 8 mons 8 days (записей: 6) brain_dev=# thanks Pavel