Java 在同一个表上使用多个联接进行休眠

我有两个postgreSQL表preference和date_etl，preference_date_etl存储它们的映射

首选项\u日期\u etl的休眠映射：

<hibernate-mapping>

    <class name="com..bla.bla.PreferenceDateETL"
        table="preference_date_etl">
        <id name="id" column="id" unsaved-value="null">
            <generator class="sequence">
                <param name="sequence">
            <![CDATA[preference_date_etl_id_seq]]>
                </param>
            </generator>
        </id>

        ...things....
    </class>
</hibernate-mapping>

问题：在order by子句中创建的preference2\日期\不在选择列表中，因此异常select DISTINCT，order by表达式必须出现在选择列表中

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问：为什么hibernate在同一个表上使用两个连接INNER和CROSS。如果有按顺序列表创建的首选项1。日期，那么一切都会很好。想法？

您可以重新构造此查询，以避免使用distinct关键字，从而对结果进行排序而不会出现问题。为此，请将PreferenceDateETL对象上的条件设置为子查询，然后检索子查询中链接到PreferenceDateETL对象的首选项对象组中的所有首选项对象。以下是HQL：

from Preference p where p in 
  (select pd.preference from PreferenceDateETL pd
  where pd.corporation.id=:corporationId
  and pd.deleted=false
  and pd.dateETL.localDate>=:startDM
  and pd.dateETL.localDate<=:endDM)
and p.employee.deleted=false
and p.deleted=false
and p.approvalStatus != :approvalStatus
order by p.dateCreated

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需要明确的是，偏好和日期之间存在多对多关系？不是一对一吗？

select
        distinct preference1_.id as id1_76_,
        ....things...
    from
        preference_date_etl preference0_ 
    inner join
        preference preference1_ 
            on preference0_.preference_id=preference1_.id cross 
    join
        preference preference2_ cross 
    join
        employee employee3_ cross 
    join
        date_etl dateetl5_ 
    where
        ...things... 
    order by
        preference2_.date_created

from Preference p where p in 
  (select pd.preference from PreferenceDateETL pd
  where pd.corporation.id=:corporationId
  and pd.deleted=false
  and pd.dateETL.localDate>=:startDM
  and pd.dateETL.localDate<=:endDM)
and p.employee.deleted=false
and p.deleted=false
and p.approvalStatus != :approvalStatus
order by p.dateCreated