Toplink JPA Calling Oracle Function Return sys_refcursor

Question

I have a function which return sys_refcursor and I am trying to call this using JPA(1.0)
@NamedNativeQuery( name = "getEmpsByDeptId"
        , query = "{ ? = call my_pck.getEmployees(:longName)}"
        , resultClass = Employee.class
        , hints = { @QueryHint(name = "org.hibernate.callable", value = "true")
                       , @QueryHint(name = "org.hibernate.readOnly", value = "true")
DAOImpl
query = getEntityManager().createNamedQuery("getEmpsByDeptId");
query.setParameter("longName", "SCOTT");
list = (List<Employee>)query.getResultList();
However when I execute, I am getting the following exception
Exception [TOPLINK-6132] (Oracle TopLink Essentials - 2.1 (Build b52-fcs (09/24/2008))):
oracle.toplink.essentials.exceptions.QueryException Exception Description:
Query argument 2 not found in list of parameters provided during query execution.
Query: ReadAllQuery(test.entity.Employee) at oracle.toplink.essentials.exceptions.QueryException.namedArgumentNotFoundInQueryParameters
I have tried using
call my_pck.getEmployees(?)}"
and
query.setParameter(1, "SCOTT");
However error remains the same and how can I resolve this issue?
I have used the same function with Hibernate using JPA2.0 and it has worked.
Thank

Answer 1

lecaro wrote:
OK. But obviously there is some oracle object that one can call via an Access pass-through query which returns rows?Just to clarify. You could fetch data in Access from an Oracle function that returns a ref cursor using VBA editor. To use a pass-through query Oracle function should be a table function or pipelined table function:
CREATE OR REPLACE
  TYPE testvalues_obj_type
    AS OBJECT(
              val varchar2(10),
              isnum number
CREATE OR REPLACE
  TYPE testvalues_tbl_type
    AS TABLE OF testvalues_obj_type
CREATE OR REPLACE
  FUNCTION fn_testvalues
    RETURN testvalues_tbl_type
    PIPELINED
    IS
        CURSOR testvalues_cur
          IS
            SELECT  testvalues_obj_type(MyValue,fn_isnum(MyValue)) testvalues_obj
              FROM  t_values;
    BEGIN
        FOR v_rec IN testvalues_cur LOOP
          PIPE ROW(v_rec.testvalues_obj);
        END LOOP;
        RETURN;
END;
/To test it in Oracle:
SELECT  *
  FROM  TABLE(fn_testvalues)
VAL             ISNUM
Merced              0
Pixie               0
452                 1
SQL> Now in Access pass-trough query window enter:
SELECT  *
  FROM  TABLE(fn_testvalues);SY.