How to do a distinct count in JPA critera API?

Question

I would like to do this but with the criteria API instead:

select count(distinct e) from Event e, IN(e.userAccessPermissions) p where p.principal = :principal an         


        

Answer 1

Use c.distinct(true) on your Query.

See http://relation.to/Bloggers/ATypesafeCriteriaQueryAPIForJPA for more samples.