java - 将 SQL 查询转换为 JPQL 时遇到问题 (Eclipselink)

Question

嘿伙计们，我有以下查询，但我似乎无法将其转换为 JPQL。工作的 SQL 是:

select * from TB_PRINT_DETAIL y inner join 
(select JOB_ID,max(COPY_NUM) MAX_COPY_NUM from TB_PRINT_DETAIL  group by JOB_ID  ) x
on y.JOB_ID = x.JOB_ID and y.COPY_NUM = x.MAX_COPY_NUM

我的微弱尝试翻译如下:

select o from PrintDetailEntity o inner join (select o2.jobId, max(o2.copyNumber) as
maxCopyNum from PrintDetailEntity o2 group by o2.jobId ) as x on o.jobId = o2.jobId and
o.copyNum = o2.maxCopyNum where o.printSuppressionReasonEntity is null

预先感谢您所提供的任何光芒!

Answer 1

如果我正确理解您的查询(在具有相同 jobId 的实体中选择具有最大 copyNumber 的实体)，则以下操作应该有效:

SELECT o 
FROM PrintDetailEntity o 
WHERE o.copyNumber = 
    (SELECT MAX(e.copyNumber) FROM PrintDetailEntity e WHERE o.jobId = e.jobId)