JPA OrderBy不工作

Question

这是一个相当简单的jpa查询，但排序永远不会有效。如果我添加ASC或DESC无关紧要

SELECT hfp FROM Lap l INNER JOIN l.footprints hfp WHERE l.id = :id ORDER BY hfp.date ASC

在此查询之后，我的输出始终相同。

Query query = em.createNamedQuery("findHardwareFootprintsWithLapIdOrderByDateASC");
        query.setParameter("id", lapId);
        List<HardwareFootprint> results = query.getResultList();
        System.out.println(results);

输出：

[Footprint[ id=21 type=NormalHandshake date=05/10/2014 08:13:41.808], Footprint[ id=20 type=NormalHandshake date=05/10/2014 08:13:21.123], Footprint[ id=18 type=NormalHandshake date=05/10/2014 08:13:11.512]]

SQL日志：

SELECT t0.ID, t0.DATE, t0.TYPE FROM HARDWAREFOOTPRINT t0, LAP_HARDWAREFOOTPRINT t2, LAP t1 WHERE ((t1.ID = ?) AND ((t2.Lap_ID = t1.ID) AND (t0.ID = t2.footprints_ID))) ORDER BY t0.DATE ASC

有人有想法吗？