JPA Criteria count + isMember生成错误的sql

Question

我正在尝试使用JPA Criteria API（Eclipselink）构建以下查询：

    final CriteriaBuilder qb = this.em.getCriteriaBuilder();
    final CriteriaQuery<Long> cq = qb.createQuery(Long.class);
    final Root<ProblemBean> problem = cq.from(ProblemBean.class);
    cq.select(qb.countDistinct(problem));
    cq.where(qb.or(qb.equal(problem.get(ProblemBean_.mainUserLv), user),  qb.isMember(user, problem.get(ProblemBean_.usersLv))));
    return this.em.createQuery(cq).getSingleResult();

基本上，我想检查是否至少有一个ProblemBean具有给定用户mainUserLv或usersLv集合的成员。 生成的SQL代码是：

SELECT COUNT(DISTINCT(t0.ID)) FROM T_PROBLEM t0, T_PROBLEM_USER t2, T_USER t1 
WHERE (((t0.ID_USER_LV = ?) OR (t1.ID = ?)) AND 
         ((t2.ID_PROBLEM = t0.ID) AND (t1.ID = t2.ID_USER)))

不用说这总是返回0。 我希望以下SQL：

SELECT COUNT(DISTINCT(t0.ID)) FROM T_PROBLEM t0, T_PROBLEM_USER t2, T_USER t1 
WHERE ((t0.ID_USER_LV = ?) OR 
        ((t1.ID = ?) AND ((t2.ID_PROBLEM = t0.ID) AND (t1.ID = t2.ID_USER))))

这是一个Eclipselink错误还是我错过了什么？