[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5419) COUNT operator with composite primary key and JPA 2.0 Criteria API produces bad sql

[Fabio Braga de Oliveira (JIRA)]

COUNT operator with composite primary key and JPA 2.0 Criteria API produces bad sql
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                 Key: HHH-5419
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5419
             Project: Hibernate Core
          Issue Type: Bug
    Affects Versions: 3.6.0.Beta1, 3.5.4, 3.5.3, 3.5.2, 3.5.1
         Environment: hibernate-entitymanager 3.6.0.Beta1, glassfish 3.0.1, linux ubuntu 10.04, MS SQL Server 2008
            Reporter: Fabio Braga de Oliveira
         Attachments: hibernate-count-bug.zip

Hibernate produces a invalid SQL if anyone use the count() operator with the JPA 2.0 Criteria API. Code:

CriteriaBuilder cb = getEntityManager().getCriteriaBuilder();
CriteriaQuery<Object[]> cq = cb.createQuery(Object[].class);
Root<EntityCompositePK> r = cq.from(EntityCompositePK.class);

cq.multiselect(cb.count(r));
assertEquals(0, ((Long) (getEntityManager().createQuery(cq).getSingleResult())[0]).intValue());


I'm sending a little maven project which reproduces the bug.



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