[英]Hibernate criteria Inner join to select
我必须将下一个表达式转换为休眠条件api:
select * from games gs
INNER JOIN (select gg.ID, gg.CODE, max(gg.DATE) max_date from games gg
where gg.player_id = 1 group by gg.ID, gg.CODE) ss
on gs.CODE = ss.CODE
and gs.ID = ss.ID
and gs.DATE = ss.max_date
and gs.player_id = 1
我该怎么做? 我能够分别创建内部和外部条件,但不知道如何将它们加入:
DetachedCriteria innerCriteria = DetachedCriteria.forClass(Games.class, "gg");
innerCriteria.add(Restrictions.eq("playerId", 1));
ProjectionList projectionList = Projections.projectionList();
projectionList.add(Projections.groupProperty("id"));
projectionList.add(Projections.groupProperty("code"));
projectionList.add(Projections.max("date"));
innerCriteria.setProjection(projectionList);
...
Criteria criteria = getSession().createCriteria(Games.class, "gs");
criteria.add(Restrictions.eq("playerId", 1));
criteria.setProjection(Projections.id());
criteria.list();
Hibernate在from
子句中不支持子查询。 从Hibernate 4.3文档中 :
请注意,HQL子查询只能在select或where子句中发生。
有一个待处理的功能请求 。
您必须重写查询以避免这种情况,或者使用本机查询。
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