SQL查询到JPQL one

我正在尝试转换此sql查询：

SELECT *
    FROM event
    WHERE idEvent IN (SELECT idEventfk FROM userevent WHERE absence='1');

转换为JPQL版本：

SELECT e FROM Event e where e.idEvent
IN (SELECT ue.idEventfk FROM userevent ue WHERE ue.absence='1'

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但是它返回的结果是

null

。是否知道错误？

如果事件实体中存在相关实体的对象，则可以将它们合并以获得所需的结果：

select e from Event e join e.userevent ue where ue.absence = '1'

试试这个：

SELECT e.* FROM Event e where e.idEvent
IN (SELECT ue.idEventfk FROM userevent ue WHERE ue.absence='1')

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您可以使用

EXISTS

子句：

SELECT e FROM Event e 
where exists 
  (SELECT ue FROM userevent ue WHERE e.idEvent = ue.idEventfk and ue.absence='1')

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不提供实体？或者说当您执行上述操作时生成了什么SQL？