Question

我有如下的SQL查询。我想将通用的product_id，authorization_ids用于某些商人ID。在此示例中，商人20000具有product1，authorization1和product2，authorization1，而其他商人仅具有product1，authorization1。

SELECT product_id,authorization_id  FROM ACQ_MERCHANT_PRODUCT_AUTH  WHERE merchant_Id = 20000
Intersect 
SELECT product_id,authorization_id  FROM ACQ_MERCHANT_PRODUCT_AUTH  WHERE merchant_Id = 20001
Intersect 
SELECT product_id,authorization_id  FROM ACQ_MERCHANT_PRODUCT_AUTH  WHERE merchant_Id = 20002

上面的查询给出正确的结果，即product1，authorization1。我正在尝试在jpa中实现它：

@Repository
public interface MerchantProductAuthorizationRepository extends 
JpaRepository<MerchantProductAuthorizationEntity, Long> {

    @Query("SELECT new com.ykb.acq.application.sweep.util.ProductAuthMap(m.product.id, m.authorization.id) FROM MerchantProductAuthorizationEntity m WHERE m.merchantId IN (:merchants) GROUP BY  m.product.id, m.authorization.id")    
    List<ProductAuthMap> findIntersactionOfProductAndAuthorizations(@Param("merchants") Set<Long> merchants);

}

但是，这给了我比交叉更多的线条。（product1，authorization1和product2，authorization2）

如何获得相同的结果？

Answer 1

您的HQL没有商人ID的相交逻辑。在此，我对由（m.product.id，m.authorization.id）分组的商人ID进行计数，如果该计数等于商人计数，则这对（m.product.id，m.authorization.id）总计商家设置。

SELECT new com.ykb.acq.application.sweep.util.ProductAuthMap(m.product.id, m.authorization.id) FROM MerchantProductAuthorizationEntity m WHERE m.merchantId IN (:merchants) GROUP BY  m.product.id, m.authorization.id having count(distinct m.merchantId) =:merchantsCount

在JpaRepository中相交

1 个答案: