@Entity
@Access(AccessType.FIELD)
@Table(name="purchase_old ")
public class Purchase {
  @Id
  public String id;
}

@Entity
@Access(AccessType.FIELD)
@Table(name="purchase_current")
public class Purchase {
  @Id
  public String uid;
}

@Test
  public void test() {
    EntityManager em = getOrCreateEntityManager();
    em.getTransaction().begin();
    CriteriaBuilder cb = em.getCriteriaBuilder();
    CriteriaQuery<org.hibernate.test.model.orders.current.Purchase> cq = cb
        .createQuery(org.hibernate.test.model.orders.current.Purchase.class);
    cq.from(org.hibernate.test.model.orders.current.Purchase.class);
    log.info("Must select from current");
    em.createQuery(cq).getResultList();

    CriteriaQuery<org.hibernate.test.model.orders.old.Purchase> cq1 = cb.createQuery(org.hibernate.test.model.orders.old.Purchase.class);
    cq1.from(org.hibernate.test.model.orders.old.Purchase.class);
    log.info("Must select from old");
    em.createQuery(cq1).getResultList();

    em.getTransaction().commit();
    em.close();
  }