Generic extractor based on specific function module with delta update

Question

Hi everybody,
I'm trying to create a specific extractor using a specific function module and a specific structure of record.
In my F.M i merge record from standard table MKPF and MSEg and return the result trhu the structure.
In initialisation mode, there's no problem . But now i'm must be able to use the DELTA mode but i don't know how to do it.
Can somebody help me?
Here is the code of my function module , i know it's not a standard one because i'm not using cursor but i got everything i need. The delta mode must be on creattion time of record in mkpf .
FUNCTION z_bw_extract_mvt_sortant.
""Interface locale :
*"  IMPORTING
*"     VALUE(I_REQUNR) TYPE  SBIWA_S_INTERFACE-REQUNR
*"     VALUE(I_ISOURCE) TYPE  SBIWA_S_INTERFACE-ISOURCE OPTIONAL
*"     VALUE(I_DSOURCE) TYPE  SBIWA_S_INTERFACE-ISOURCE OPTIONAL
*"     VALUE(I_MAXSIZE) TYPE  SBIWA_S_INTERFACE-MAXSIZE OPTIONAL
*"     VALUE(I_INITFLAG) TYPE  SBIWA_S_INTERFACE-INITFLAG OPTIONAL
*"  TABLES
*"      E_T_DATA STRUCTURE  ZBW_MVTSORTANT OPTIONAL
*"      I_T_SELECT TYPE  SBIWA_T_SELECT OPTIONAL
*"      I_T_FIELDS TYPE  SBIWA_T_FIELDS OPTIONAL
*"  EXCEPTIONS
*"      NO_MORE_DATA
*récupération des données.
  CASE i_initflag.
    WHEN space.
      transfert_record it_mvtsor e_t_data i_maxsize.
     DESCRIBE TABLE it_mvtsor LINES sy-tfill.
     IF sy-tfill GT i_maxsize.
       APPEND LINES OF it_mvtsor FROM 1 TO i_maxsize TO e_t_data.
       DELETE it_mvtsor FROM 1 TO i_maxsize.
     ELSEIF sy-tfill GT 0.
       APPEND LINES OF it_mvtsor FROM 1 TO sy-tfill TO e_t_data.
       FREE it_mvtsor.
     ELSE.
       RAISE no_more_data.
     ENDIF.
    WHEN OTHERS.
raffraichissement des variables de travails.
      FREE : r_werks , r_bwart , it_mkpf , it_mseg , it_mvtsor .
      CLEAR : r_werks , r_bwart , it_mkpf , it_mseg , it_mvtsor .
récupération des paramètres.
      PERFORM set_selection_criteria TABLES i_t_select.
      PERFORM init_code_mouvement.
      SELECT * FROM mkpf
      APPENDING CORRESPONDING FIELDS OF TABLE it_mkpf.
WHERE cpudt = sy-datum.
      CHECK NOT it_mkpf IS INITIAL.
      SELECT * FROM mseg
        APPENDING CORRESPONDING FIELDS OF TABLE it_mseg
        FOR ALL ENTRIES IN it_mkpf
        WHERE mblnr = it_mkpf-mblnr
          AND mjahr = it_mkpf-mjahr
          AND werks IN r_werks
          AND bwart IN r_bwart.
      LOOP AT it_mkpf ASSIGNING  .
        ENDLOOP.
      ENDLOOP.
  ENDCASE.
ENDFUNCTION.
Thanks in advance.

Answer 1

Hi,
first of all: The use of delta in a generic Datasource by FM is not supported by SAP standard. You need to change the extraction method in table ROOSOURCE from F2 to F1. There is no standard transaction to do this, you have to do a hard table update. Be careful not to change any standard datasource by error, otherwise you can get serious problems.
The interface for the FM will change with the new extraction method. You will need a new parameter I_UPDMODE of type SBIWA_S_INTERFACE-UPDMODE to distinguish between Init, Delta and Full Load.
For an example coding please refer to FM RSVD_BW_GET_DELTA_DATA.
Hope that helps
Stephan
Message was edited by: Stephan Müller