休眠DetachedCriteria子查詢中帶有和子句的查詢

Question

如何使用Hibernate的分離標準解決此查詢？對我來說最難的部分是將and u1.abrechnungsDatum is null納入子選擇。 我想這樣的查詢：

select * 
from 
    patient as p 
where 
    p.krankenstand = ? 
and 
    ? < (select count(*) from ueberweisung u1 where p.id = u1.patient_id 
     and u1.abrechnungsDatum is null) 

我有這個

DetachedCriteria dc = DetachedCriteria.forClass(Patient.class, "patient"); 
dc.add(Restrictions.eq("krankenstand", true)); 

DetachedCriteria nab = dc.createCriteria("ueberweisungs", "nab"); 
nab.add(Restrictions.isNull("nab.abrechnungsDatum")); 
dc.add(Restrictions.sizeGt("ueberweisungs", 0)); 

這給了我下面的SQL語句試過

select 
    * 
from 
    patient this_ 
inner join 
    ueberweisung nab1_ 
     on this_.id=nab1_.patient_id 
where 
    this_.krankenstand=? 
    and nab1_.abrechnungsDatum is null 
    and ? < (
     select 
      count(*) 
     from 
      ueberweisung 
     where 
      this_.id=patient_id 
    ) 

正如你所看到的，和 - 字段abrechnungsDatum不適用於子選擇。我怎樣才能做到這一點呢？

Answer 1

試試這個：

DetachedCriteria dc = DetachedCriteria.forClass(Patient.class, "patient"); 
dc.add(Restrictions.eq("krankenstand", true)); 

DetachedCriteria subquery = DetachedCriteria.forClass(Ueberweisung.class); 
subquery.add(Restrictions.isNull("abrechnungsDatum")); 

dc.add(Subqueries.ltAll(0, subquery));