Query Error With Custom Persistent Class

[Former Member]

Hi, I am new to OO programming and trying to create a persistent class and call the query manager with parameters.  I am getting the error 'The method is implemented in a subclass' as an exception.  I created the persistent class ZCL_SOURCE_RECORD off of table EORD which generated actor class ZCA_SOURCE_RECORD and base class ZCB_SOURCE_RECORD.  I must have missed something in the setup.  Here is my program logic to call the method:

REPORT  zptp_source_list.

************************************************************************
*                       T A B L E S                                    *
************************************************************************
TABLES: eord, usr01.

************************************************************************
*                  D A T A     D E F I N I T I O N                     *
************************************************************************
DATA: gt_eord       TYPE        eord_tty,
      ft_select     TYPE        rsparams_tt,
      query_mng     TYPE REF TO if_os_query_manager,
      query_by_eord TYPE REF TO if_os_query,
      lt_records    TYPE        osreftab,
      ierr          TYPE REF TO cx_root,
      agent         TYPE REF TO zca_source_record.

FIELD-SYMBOLS <wa_eord>.

************************************************************************
*                   S E L E C T  -  O P T I O N S                      *
*                       P A R A M E T E R S                            *
************************************************************************
SELECTION-SCREEN BEGIN OF BLOCK a1.
*SELECT-OPTIONS s_matnr FOR eord-matnr.
*SELECT-OPTIONS s_werks FOR eord-werks.
PARAMETERS     p_matnr TYPE eord-matnr.
PARAMETERS     p_werks TYPE eord-werks.
SELECT-OPTIONS s_lifnr FOR eord-lifnr.
SELECT-OPTIONS s_erdat FOR eord-erdat.
SELECT-OPTIONS s_ernam FOR eord-ernam.
SELECT-OPTIONS s_vdatu FOR eord-vdatu.
SELECT-OPTIONS s_bdatu FOR eord-bdatu.
SELECT-OPTIONS s_flifn FOR eord-flifn.
SELECT-OPTIONS s_notkz FOR eord-notkz.
SELECTION-SCREEN END OF BLOCK a1.

************************************************************************
*                   I N I T I A L I Z A T I O N                        *
************************************************************************
INITIALIZATION.

************************************************************************
*            S T A R T   -   O F   -  S E L E C T I O N                *
************************************************************************
START-OF-SELECTION.

  PERFORM get_data.

*&---------------------------------------------------------------------*
*&      Form  GET_DATA
*&---------------------------------------------------------------------*
*       Get data for output
*----------------------------------------------------------------------*

FORM get_data .

  agent = zca_source_record=>agent.

  TRY.
      query_mng = cl_os_system=>get_query_manager( ).
      query_by_eord = query_mng->create_query(
           i_filter = `MATNR = PAR1 AND WERKS = PAR2` ).

      lt_records = agent->if_os_ca_persistency~get_persistent_by_query(
         i_query = query_by_eord
         i_par1  = p_matnr
         i_par2  = p_werks ).

      LOOP AT lt_records ASSIGNING <wa_eord>.
      ENDLOOP.

    CATCH cx_root INTO ierr.
      MESSAGE ierr TYPE 'I'.
  ENDTRY.

ENDFORM.

Any ideas?

Regards,

Todd

[Former Member]

hello,

When a query is
created with the Query Manager’s CREATE_QUERY method, the filter conditions and
sort conditions are passed to it.

The query itself is
merely a container for the filter condition and the sort condition. A query is
executed by calling interface method IF_OS_CA_PERSISTENCY~GET_PERSISTENT_BY_QUERY
in the class actor of a persistent class. Similarly, the result of a query’s
execution is not bound to the query, but is returned by the class actor’s method
as a table of references.

best regards,

swanand

[Former Member]

Swanand,

Thanks for the response. I follow you and thought that I was trying to do just that.  However, when I run my program, I get the exception 'The method is implemented in a subclass' and my table lt_records does not get filled.  What should I change to get past that or how cna I troubleshoot further? 

Regards,

Todd

[Former Member]

hello,

Probably you don't have to re-define these methods. The methods are automatically redefined by the system when you complete the OR mapping! Did you complete the OR mapping in your persistence class?

check this link

http://scn.sap.com/thread/1735340

best regards,

swanand

[Former Member]

Swanand,

I think I did.  I clicked on the Persistence button, specified my table and then imported the fields into the mapper.  It generated all of the fields as attributes as well as the base and actor classes with the system methods.  I activated everything and it appears to be correct but when I try to use it in my program I get the error at runtime.

Todd

[Former Member]

Hello Todd,

The issue is due to the fact that the method's never got generated. You have to explicitly tell the mapper that you would be using queries. Attached is the screen shot on how to achieve it.

Hope this helps,

Venkat.

[Former Member]

Venkat, that was exactly the issue.  Thank you so much!