JPA 和 ORACLE 函数：使用 NamedNativeQuery 调用存储过程时出错

Question

I have an Oracle function

CREATE OR REPLACE FUNCTION SOL.UPDATE_LD_OAUDITORID (
vCUSTOMERID       NUMBER,
vAPPOINTOFCAID    NUMBER,
vAUDITORID        NUMBER,
vOAUDITORID       NUMBER)

RETURN NUMBER
IS
PRAGMA AUTONOMOUS_TRANSACTION;

vGROUPID      NUMBER;
rTN           NUMBER;

CURSOR c
IS
  SELECT COMPANYID,
         GROUPID,
         PERIODID,
         PROCESSID,
         CUSTOMERID,
         APPOINTOFCAID,
         AUDITORID
    FROM LIQUIDATIONSDETAILS
   WHERE     CUSTOMERID = vCUSTOMERID
         AND APPOINTOFCAID = vAPPOINTOFCAID
         AND AUDITORID = vAUDITORID
         AND (       PERIODID = fn_periodcurrent
                 AND PROCESSID = FN_PROCESSCURRENT
              OR PERIODID = fn_periodNEXT AND PROCESSID = FN_PROCESSNEXT) FOR UPDATE;

TYPE nt_type IS TABLE OF c%ROWTYPE;
l_arr         nt_type;
DML_ERRORS    EXCEPTION;
PRAGMA EXCEPTION_INIT (DML_ERRORS, -24381);
l_errors      NUMBER;
errorCnt      NUMBER;
errString     VARCHAR2 (4000);
l_idx         NUMBER;
BEGIN
SELECT FN_CURRENTGROUP (vOAUDITORID) INTO vGROUPID FROM DUAL;

OPEN c;

LOOP
  FETCH c
  BULK COLLECT INTO l_arr
  LIMIT 500;

  EXIT WHEN l_arr.COUNT = 0;

  BEGIN
     FORALL i IN 1 .. l_arr.COUNT SAVE EXCEPTIONS
        UPDATE liquidationsdetails
           SET groupid = vgroupid, auditorid = vOAUDITORID
         WHERE     COMPANYID = l_arr (i).COMPANYID
               AND GROUPID = l_arr (i).GROUPID
               AND PERIODID = l_arr (i).PERIODID
               AND PROCESSID = l_arr (i).PROCESSID
               AND CUSTOMERID = l_arr (i).CUSTOMERID
               AND APPOINTOFCAID = l_arr (i).APPOINTOFCAID
               AND AUDITORID = l_arr (i).AUDITORID;

     RTN := 1;
  EXCEPTION
     WHEN dml_errors
     THEN                        -- Now we figure out what failed and why.
        errorCnt := SQL%BULK_EXCEPTIONS.COUNT;
        errString :=
           'Number of statements that failed: ' || TO_CHAR (errorCnt);

        RTN := 0;
  END;
END LOOP;

CLOSE C;

COMMIT;

RETURN RTN;
END;
/

A dummy entity bean with namednativequery the call of the function

@Entity
@NamedNativeQueries({
@javax.persistence.NamedNativeQuery(name = "updateldoauditorid", query = ""
        + "{? =  call UPDATE_LD_OAUDITORID(:customerid, :appointofcaid, :auditorid, :oauditorid)}", resultClass = DummyEntity.class,
        hints = {
            @javax.persistence.QueryHint(name = "org.hibernate.callable", value = "true")})})

public class DummyEntity implements Serializable {
...

a stateless session

@Override
public int spUpdate_ld_oauditorid(String customerid, String appointofcaid, String auditorid, String oauditorid) {
    Integer isup = (Integer) em.createNamedQuery("updateldoauditorid")
            .setParameter(customerid, customerid)
            .setParameter(appointofcaid, appointofcaid)
            .setParameter(auditorid, auditorid)
            .setParameter(oauditorid, oauditorid)
            .getSingleResult();

    return isup;
}

a jsp page that call the following

try {
        update = dummyFacade.spUpdate_ld_oauditorid(customerid, appointofcaid, auditorid, oauditorid);

    } catch (Exception ex) {
        ex.printStackTrace();
    }

I am getting the error

java.lang.NullPointerException at org.apache.jsp.members.appointsofcas.liquidations.liquidations_005fa_005foauditorid_jsp.Updateldoauditorid(liquidations_005fa_005foauditorid_jsp.java:96) at org.apache.jsp.members.appointsofcas.liquidations.liquidations_005fa_005foauditorid_jsp._jspService(liquidations_005fa_005foauditorid_jsp.java:415) when execute the jsp page

Answer 1

In your stateless session bean, you are setting the parameters incorrectly. You are using the value of the parameter twice, you probably forgot the "" for the first parameter when you called to setParameter() .

@Override
public int spUpdate_ld_oauditorid(String customerid, String appointofcaid, String auditorid, String oauditorid) {
    Integer isup = (Integer) em.createNamedQuery("updateldoauditorid")
        .setParameter("customerid", customerid)
        .setParameter("appointofcaid", appointofcaid)
        .setParameter("auditorid", auditorid)
        .setParameter("oauditorid", oauditorid)
        .getSingleResult();

return isup;
}