Hibernate -distinct (with disjunction) via criteria

How to write distinct using Hibernate criteria API?

DetachedCriteria crit = DetachedCriteria.forClass(clazz);

Disjunction dis = Restrictions.disjunction(); // OR
dis.add(Restrictions.eq("billType", BillType.RACUN));
dis.add(Restrictions.eq("billType", BillType.STORNO));
crit.add(dis);

crit.setProjection(Projections.distinct(Projections.property("billSubtype")));

Criteria criteria = crit.getExecutableCriteria(getSession());
return crit.list();

select distinct B.BILLSUBTYPE from bill b where (B.BILLTYPE = 'RACUN' or B.BILLTYPE = 'STORNO')


http://www.jairrillo.com/blog/2009/01/29/how-to-use-left-join-in-hibernate-criteria/