Java 休眠条件内部联接以选择
我必须将下一个表达式转换为hibernate标准api:Java 休眠条件内部联接以选择,java,hibernate,criteria-api,Java,Hibernate,Criteria Api,我必须将下一个表达式转换为hibernate标准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
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
我怎么做?我能够分别创建内部标准和外部标准,但不知道如何加入它们:
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);
Hibernate不支持
from
子句中的子查询。从:
请注意,HQL子查询只能出现在select或where中
条款
这是有道理的
您必须重写查询以避免这种情况,或者使用本机查询
Criteria criteria = getSession().createCriteria(Games.class, "gs");
criteria.add(Restrictions.eq("playerId", 1));
criteria.setProjection(Projections.id());
criteria.list();