Hibernate：两个不同实体的投影（SUM）差异

Question

我已经编写了一个sql代码，用于根据给定日期获得项目结算的价值。

SELECT (SELECT Sum(qtyreceived) 
    FROM   purchaseinvoicedetails pid, 
           purchaseinvoice pi 
    WHERE  itemid_itemid = 1 
           AND pi.piid = pid.pidetails 
           AND pi.pidate < Curdate()) - (SELECT Sum(qtysent) 
                                         FROM   salesinvoicedetails sid, 
                                                salesinvoice si 
                                         WHERE  itemid_itemid = 1 
                                                AND si.siid = sid.siid_siid 
                                                AND si.sidate < Curdate()) 
   AS 
   closingstock 

返回商品的收盘价值。

我想用hibernate标准实现同样的目标。 我无法弄清楚逻辑。

先谢谢