Hibernate Criteria Group by AND 排序依据

Question

我需要将下一个查询放入条件

SELECT DISTINCT SUBSTRING(id, 1, LENGTH(id)-3) AS id_trunc, MAX(version) as version, MAX(code) as code
FROM theTable 
WHERE (version like '%.%' AND NOT version LIKE '%.0' AND event_code LIKE 'CODE1') OR (version LIKE '%.0' AND code LIKE 'CODE2')
GROUP BY id_trunc
ORDER BY id_trunc, version, code

我有使用 Criteria 的经验，但只是为了简单的东西，在这种情况下，我需要一种方法来进行投影、Group By 和 Order By。我试了几次，但没能成功。我到处找了找，但找不到任何帮助来解决像这个问题这样复杂的查询。

这是我目前所拥有的

    Criterion whereClause = Restrictions.and(Restrictions.like("version","%.%"), 
                            Restrictions.and(Restrictions.not(Restrictions.like("version","%.0")),Restrictions.like("code","CODE1")));

    Criterion secondWhere = Restrictions.and(Restrictions.like("Version","%.0"), Restrictions.like("code","CODE2"));
    LogicalExpression orWhere= Restrictions.or(whereClause,secondWhere);
    criteria.add(orWhere);

Answer 1

你的限制部分是对的。

因此，要计算您的投影：

criteria.setProjection(Projections.projectionList().
  add(Projections.groupProperty("SUBSTRING(id, 1, LENGTH(id)-3)", "id_trunc")).
  add(Projections.max("version")).
  add(Projections.max("code")))

现在要映射您的结果，您需要另一个对象，它只包含三个字段和一个转换器。

 criteria.setResultTransformer(Transformers.aliasToBean(TruncatedIdWithMaxVersion.class))

对于 ORDER BY：

criteria.addOrder(Order.asc("id_trunc"));

Hibernate Criteria Group by AND 排序依据

Hibernate Criteria Group by AND Order By

java

hibernate

criteria