How to use oracle OCIANYDATASET?

Question

Hi, All
When I try to update oracle example "Pipelined Table Functions Example: C Implementation" to return OCIANYDATASET, but from oracle documnet, I cannot find any example about how to use OCIANYDATASET, would you please help me out of this issue, any example or advice is benefit for this issue. thanks.
The PL/SQL below works OK now:
member function ODCITableFetch(self in out StockPivotImpl, nrows in number,  record_out out anydataset) return number is
  rc SYS_REFCURSOR;
  value  pls_integer;
  cur StockTable%ROWTYPE;
  begin
    record_out := null;
     DBMS_ODCI.RestoreRefCursor(rc, self.cur_n);
    if row_was_returned = 1 then
      return ODCIconst.success;
    end if;
    row_was_returned := 1;
    anydataset.begincreate(dbms_types.typecode_object, self.row_types, record_out);
     loop
          fetch rc into cur;
          EXIT WHEN rc%NOTFOUND;
          record_out.addinstance;
        record_out.piecewise();
          -- Setting the returned values:
          record_out.setvarchar2(cur.ticker);
          record_out.setnumber  (cur.openprice);
          record_out.setnumber  (nrows);
          record_out.setvarchar2('new_column');
     end loop;     
     close rc;
    record_out.endcreate;
    return odciconst.success;
  end;But how to implement below C function, especially how to append value into OCIAnyDataSet and return it?
-- Create table function
CREATE FUNCTION StockPivot(p refcur_pkg.refcur_t) RETURN anydataset
PIPELINED USING StockPivotImpl;
SELECT * FROM TABLE(StockPivot(CURSOR(SELECT * FROM StockTable)));
  MEMBER FUNCTION ODCITableFetch(self IN OUT StockPivotImpl, nrows IN NUMBER,
                                 record_out out anydataset) RETURN PLS_INTEGER
    AS LANGUAGE C
    LIBRARY StockPivotLib
    NAME "ODCITableFetch"
    WITH CONTEXT
    PARAMETERS (
      context,
      self,
      self INDICATOR STRUCT,
      nrows,
      record_out,
      record_out INDICATOR,
      RETURN INT
int ODCITableFetch(OCIExtProcContext* extProcCtx, StockPivotImpl* self,
                       StockPivotImpl_ind* self_ind, OCINumber* nrows,
                       OCIAnyDataSet* outSet, short* outSet_ind)Edited by: BluShadow on 11-Apr-2013 10:42
added {noformat}{noformat} tags for readability.  Please read the FAQ: {message:id=9360002} and learn to do this yourself in future.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Answer 1

Thanks for your reply, Yes, I have read the doc, but it seems like that doesn't work in my code. I'm not sure whether I missed something. My steps below:
int ODCITableFetch(OCIExtProcContext* extProcCtx, StockPivotImpl* self,
                    StockPivotImpl_ind* self_ind, OCINumber* nrows,
                    OCIAnyDataSet* outSet, short* outSet_ind)
OCIAnyData* myData = (OCIAnyData*)0;
status = OCIAnyDataSetBeginCreate(handles.svchp, handles.errhp, OCI_TYPECODE_OBJECT, (OCIType *)self->out, OCI_DURATION_SESSION, &outSet);
status = OCIAnyDataSetAddInstance(handles.svchp, handles.errhp, outSet, &myData);
//AAA
OCIStringAssignText(handles.envhp, handles.errhp, (text *)"CA", 2, &str);
checkerr(&handles, OCIAnyDataAttrSet(handles.svchp, handles.errhp, (OCIAnyData*)myData, (OCITypeCode)OCI_TYPECODE_VARCHAR2,(OCIType *)0, (dvoid *)&indp, (void*)str, sizeof(str), FALSE)); // Crashed here
//BBB
status = OCIAnyDataSetEndCreate(handles.svchp,handles.errhp, outSet);
//CCC
return ODCI_SUCCESS;
It crashed in function OCIAnyDataAttrSet(), but when I added the function OCITypeByName() and OCIAnyDataBeginCreate() in AAA and OCIAnyDataEndCreate() in BBB, no error happened again and I can get the instance in CCC with function OCIAnyDataSetGetInstance() and I also can get the value via function OCIAnyDataAttrGet() after CCC from the instance, but when I run the query, it is no rows selected, why?