When I try to create a criteria like the following: | Criteria c = ((SessionImpl) entityManager.getDelegate()) | .createCriteria(Person.class); | | pCriteria.add(Restrictions.isNull("location")); | where location is the attribute of an one-to-one relation, i don't get any hit in the resultlist, even there are records in the database matching this criteria. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4089570#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...