Postgresql JPA在使用Postgres处理存储过程时找不到参数

在以下问题上所做的任何努力都是非常值得注意的。 我正在尝试使用@NamedStoredProcedureQueries调用存储过程

下面是我的实体类的代码片段

@Entity
@Table(name = "tx_oppertunity")

@NamedStoredProcedureQueries({ //
@NamedStoredProcedureQuery(name = "oppertunity.pastOppertunities", procedureName = "pastOppertunities",resultSetMappings="myMapping")})

@SqlResultSetMappings({
    @SqlResultSetMapping(
            name = "myMapping",
            classes = @ConstructorResult(targetClass = DataHolder.class, columns = { @ColumnResult(name = "oppertunityid") }))
    })


public class Oppertunity {

    /** The oppertunity id. */
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "GEN_TX_OPPERTUNITY_SEQ")
    @SequenceGenerator(allocationSize = 1, name = "GEN_TX_OPPERTUNITY_SEQ", sequenceName = "tx_oppertunity_seq")
    @Column(name = "oppertunity_id", nullable = false, unique = true)
    private Long oppertunity_id;

  // other fields to follow
}

我的存储过程是用postgres编写的，如下所示

CREATE OR REPLACE FUNCTION pastOppertunities()
  RETURNS TABLE(oppertunityid integer) AS
$BODY$  
    BEGIN
            RETURN QUERY select cast((opp.oppertunity_id) as integer)  from tx_oppertunity opp where (opp.end_date)< (NOW() - INTERVAL '2 days'); 
     END;
  $BODY$
  LANGUAGE plpgsql

public class DataHolder implements Serializable{

    private Integer oppertunityid;

    /**
     * @return the oppertunityid
     */
    public Integer getOppertunityid() {
        return oppertunityid;
    }

    /**
     * @param oppertunityid the oppertunityid to set
     */
    public void setOppertunityid(Integer oppertunityid) {
        this.oppertunityid = oppertunityid;
    }

    public DataHolder(Integer oppertunityid) {

        this.oppertunityid = oppertunityid;
    }

}

但是，如果我尝试使用JPA存储库运行该过程

@Procedure(name = "oppertunity.pastOppertunities")
public List<DataHolder> findPastOppertunities();

我不确定我在这里缺少什么，所有参数都在@SQLREsultSetMapping中正确指定，我在过程中添加了显式类型转换以强制返回整数值

有一篇帖子建议使用实体管理器调用存储过程，经过长时间的斗争后，我使用实体管理器进行了调用，它非常有效

public List<DataHolder> findPastOppertunities() {
        // TODO Auto-generated method stub
            StoredProcedureQuery spq = em.createStoredProcedureQuery("pastOppertunities");
            List<DataHolder> resultList = spq.getResultList();
            return resultList;
        //return oppRepo.findPastOppertunities();

    }

public List findpastoppertonities（）{
//TODO自动生成的方法存根
StoredProcedurey spq=em.createStoredProcedurey（“PastOpportunities”）；
List resultList=spq.getResultList（）；
返回结果列表；
//返回oppRepo.findpastopertunities（）；
}

然而，我想了解，如果JPA存储库存在缺陷，为什么JPA不能使用@SqlResultSetMapping映射strored过程的结果

谢谢， 迪佩什

public List<DataHolder> findPastOppertunities() {
        // TODO Auto-generated method stub
            StoredProcedureQuery spq = em.createStoredProcedureQuery("pastOppertunities");
            List<DataHolder> resultList = spq.getResultList();
            return resultList;
        //return oppRepo.findPastOppertunities();

    }