将SQL查询转换为Hibernate查询

Question

我需要帮助将一些sql转换为hibernate sql。

SQL：

String sql = "select time, hour(time) as hour, minute(time) as minute "
           + "from db where time >= DATE_ADD(now(), INTERVAL -24 HOUR) "
           + "group by 2 order by time LIMIT 500";

我使用SQLQuery添加标量。我为HQL尝试了这个：

String hql = "select time, hour(time), minute(time) from db as O "
           + "where O.time >= :time group by 2 order by O.time";

Query query = session.createQuery(hql);
query.setDate("time", calend.getTime()); //calend is a Calendar object

然而，这不起作用。错误说它是一个hql错误。