How to set parameters for a Named Query

Question

Hi I have a Named Query

@NamedQuery(name = \"StudyplanCategory.findByStatusAndLimit\",
            query = \"SELECT s FROM StudyplanCategory s WHERE 
           


        

Answer 1

As @DataNucleus said, LIMIT is not a valid keyword in JPQL. That's not the way to specify how many rows to return. This is how you do it:

@NamedQuery(name = "StudyplanCategory.findByStatusAndLimit", 
        query = "SELECT s FROM StudyplanCategory s WHERE 
                    s.status =:status")

And this would be the code to call the named query:

Query query = entityManager.createNamedQuery("StudyplanCategory.findByStatusAndLimit");
int end=(start*pageNumber);
query.setParameter("status", status);
query.setFirstResult(start);
query.setMaxResults(end - start);
return (List) query.getResultList();