Vendor Code addition in MB21 Screen

We got the requirement from the client that to add Vendor code field in Reservation screen (Tcode-MB21/22) & Update Vendor Code against Reservation.

So I have looked all the EXIT provide by SAP but none of then contained Screen Exit. So I have looked on SCN for any further possibility to full fill this requirement. Mostly talked about same EXIT & BADI’s  But strangely I could not find any particular solution which will solve my quest.

I thought it’s better to share my solution that how we solve this quest So that It might be helpful to people with the same requirement.

Let’s get started 😉 …!!!

As a developer, debugging is the best tool to find & understand the flow of the program.

After lots of debugging the standard programs, we come to the solution that we will provide a pop up to add vendor code as they need in the header level & fortunately user accepted our solution.

As there is no screen exit for ME21/22 so we fulfill the requirement by just giving the pop up during SAVE.

During debugging I have found various enhancement spot but very few spots fulfill our requirement & below is the detailed solution for that.

Program Name: MM07RFR0

Just Create Enhancement spot at the end of the subroutine: r–segmente_generieren 

as shown in below screenshot:

Below is the Code Sample:

ENHANCEMENT 1  ZMB_VENDOR_POP_UP.    "active version
    IF sy-tcode EQ 'MB21' OR sy-tcode EQ 'MB22'.
    DATA:
          it_resb  TYPE STANDARD TABLE OF sval,
          wa_resb TYPE sval,
          it_resb_ext TYPE STANDARD TABLE OF resb,
          lv_lifnr TYPE resb-lifnr.

    IF it_resb IS INITIAL.
    wa_resb-tabname = 'RESB'.
    wa_resb-fieldname = 'LIFNR'.
    IF xresb-lifnr IS NOT INITIAL.
*--Display Vendor--*
          wa_resb-value = xresb-lifnr.
    ENDIF.
    APPEND wa_resb TO  it_resb.
    ENDIF.
*--Pop up for Vendor--*
    CALL FUNCTION 'POPUP_GET_VALUES'
      EXPORTING
        popup_title           = 'Select Vendor'
      tables
        fields                = it_resb
     EXCEPTIONS
       ERROR_IN_FIELDS       = 1
       OTHERS                = 2           .
    IF sy-subrc <> 0.
* Implement suitable error handling here
    ENDIF.

      READ TABLE it_resb ASSIGNING FIELD-SYMBOL(<fs_resb>) INDEX 1.
*--Fill the Vendor in RESB--*
      IF sy-subrc IS INITIAL.
        lv_lifnr = <fs_resb>-value.
      ENDIF.
    IF xresb IS NOT INITIAL.
      LOOP AT xresb ASSIGNING FIELD-SYMBOL(<fs_xresbz>).
            IF lv_lifnr IS NOT INITIAL.
              <fs_xresbz>-lifnr = lv_lifnr.
          ENDIF.
      ENDLOOP.
    ENDIF.
*--For No change--*
    IF upd_resb IS INITIAL AND upd_rkpf IS INITIAL AND
       new_resb IS INITIAL AND sy-tcode EQ 'MB22'.
       IF xresb-rsnum IS NOT INITIAL.
       SELECT
         *
         FROM resb
         INTO TABLE it_resb_ext
         WHERE rsnum = xresb-rsnum.
        IF sy-subrc IS INITIAL.
          LOOP AT it_resb_ext ASSIGNING FIELD-SYMBOL(<fs_resb_update>).
            IF <fs_resb_update>-lifnr NE lv_lifnr.
            <fs_resb_update>-lifnr = lv_lifnr.
*--Update the Vendor--*
             UPDATE resb SET lifnr = <fs_resb_update>-lifnr
                         WHERE rsnum EQ <fs_resb_update>-rsnum
                          AND  rspos EQ <fs_resb_update>-rspos
                          AND  rsart EQ <fs_resb_update>-rsart.
            ENDIF.
          ENDLOOP.
        ENDIF.
       ENDIF.
    ENDIF.
   ENDIF.

ENDENHANCEMENT.

Above solution handle both the requirement i.e. during creating (MB21) it saved the Vendor code against Reservation & during change (MB22) it should display the previous vendor & able to change the same at the SAVE moment.

Final output:

When clicking on SAVE button (MB21) the user will get pop up for vendor code –

After Saved Vendor got updated against reservation in Table – RESB

Also, the same will be reflected in MIGO –

Your feedback & improvement are always welcome! 🙂

Regards,

Rajio Urkude