如何在Java中将此SQL查询编写为Hibernate JPA Criteria(带限制等)?
SELECT q.*
FROM queue AS q
WHERE q.executed = false AND
q.queued_on = (SELECT min(queued_on) FROM queue WHERE item_id = q.item_id);
我只设法编写第一部分:
getBaseCriteria()
.add(Restrictions.eq("executed", false))
// Missing Second Where Filter Here
.addOrder(Order.asc("queuedOn"))
.list();
答案 0 :(得分:1)
尝试为子查询创建单独的条件实例,并简单地添加另一个限制,如下所示:
DetachedCriteria subCriteria = DetachedCriteria.forClass(Queue.class, "sub")
.add(Restrictions.eqProperty("sub.itemId","main.itemId"))
.setProjection(Projections.projectionList().add(Projections.min("sub.queuedOn")));
session.createCriteria(Queue.class, "main")
.add(Subqueries.propertyEq("main.queuedOn", subCriteria ));
.add(Restrictions.eq("main.executed", false));
.addOrder(Order.asc("main.queuedOn"))
.list();