AS400 db2上使用JPA的“未知列”

Question

原因：org.hibernate.exception.sqlgrammarexception：无法执行查询

原因:com.ibm.as400.access.as400JDBCSQLSyntaxerrorexception：检测到未定义的列名。

查询实现：

public interface DistributionRepository extends JpaRepository<ERHDSTV1, Long> {

@Query(value="select  "
        + "    DFBOGARM, "
        + "    sum(KVANTUM1) as KVANTUM1, "
        + "    (sum(DSTOMK) * 1000 / sum(KVANTUM1)) as DSTOMK, "
        + " (sum(DSTAKK) * 1000 / sum(KVANTUMAKK)) as DSTAKK "
        + "from NHODATA.ERHDSTV1 "
        + "where DFSALVAR in(52, 55) "
        + "group by DFBOGARM "
        + "order by DFBOGARM", nativeQuery = true)
List<ERHDSTV1> findSummedValuesFor52and55();}

@Entity
@IdClass(ERHDSTV1Id.class)
@Table(name = "ERHDSTV1")
@Data
public class ERHDSTV1 {
   @Id
   @Column(name = "DFBOGARM")
   private String yearMonth;
   @Id
   @Column(name = "DFSALVAR")
   private Long salesType;
   @Column(name = "KVANTUM1")
   private Long volumeOne;
   @Column(name = "DSTOMK")
   private Long distributionCosts;
   @Column(name = "DSTMDN")
   private Long distributionMedian;
   @Column(name = "KVANTUMAKK")
   private Long volumeAccumulated;
   @Column(name = "DSTAKK")
   private Long distributionAccumulated;
   @Column(name = "DSTMNDAKK")
   private Long distributionMedianAccumulated;
}

Answer 1

错误是我必须为上面的每一列选择值。

这意味着我的查询是这样的：

@Query(value = "select  "
        + "    DFBOGARM, 1 as DFSALVAR, 1 as DSTMND, 1 as DSTMNDAKK, 1 as KVANTUMAKK, "
        + "    sum(KVANTUM1) as KVANTUM1, "
        + "    (sum(DSTOMK) * 1000 / sum(KVANTUM1)) as DSTOMK, "
        + " (sum(DSTAKK) * 1000 / sum(KVANTUMAKK)) as DSTAKK "
        + "from NHODATA.ERHDSTV1 "
        + "where DFSALVAR in(52, 55) "
        + "group by DFBOGARM "
        + "order by DFBOGARM", nativeQuery = true)

这招奏效了。