Hibernate：使用子查询查询联接

我需要将下面的查询转换为hibernate-

select * from ep_batch eb
INNER JOIN ep_slide slide ON eb.batch_scanner_id  = slide.slide_batch_id
WHERE eb.batch_scanner_id = 1 AND 
eb.batch_status = 
(
IF((SELECT count(batch_id) as cnt from ep_batch WHERE batch_scanner_id = 1) =1,'Ready','In Progress')
) ;

我有“幻灯片”和“批次”pojo代表ep_幻灯片和ep_批次。连接注释为-

@OneToMany(mappedBy = "batch")
    private Set<Slide> slides;
@ManyToOne
    @JoinColumn(name = "batchId")
    private Batch batch;

---

我还没有执行，但是您可以尝试下面的HQL，适当地替换实体属性

SELECT b FROM Batch b, Slide s 
WHERE b.batch_scanner_id = s.slide_batch_id AND 
b.batch_status = 
(CASE WHEN ((SELECT COUNT(bt.batch_id) FROM Batch bt WHERE bt.batch_scanner_id = 1) = 1) THEN 'Ready' 
ELSE 'In Progress' 
END);

SELECT b FROM Batch b, Slide s 
WHERE b.batch_scanner_id = s.slide_batch_id AND 
b.batch_status = 
(CASE WHEN ((SELECT COUNT(bt.batch_id) FROM Batch bt WHERE bt.batch_scanner_id = 1) = 1) THEN 'Ready' 
ELSE 'In Progress' 
END);