[英]Hibernate criteria Inner join to select
我必須將下一個表達式轉換為休眠條件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
我該怎么做? 我能夠分別創建內部和外部條件,但不知道如何將它們加入:
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
子句中不支持子查詢。 從Hibernate 4.3文檔中 :
請注意,HQL子查詢只能在select或where子句中發生。
有一個待處理的功能請求 。
您必須重寫查詢以避免這種情況,或者使用本機查詢。
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