Abap report - consignment stock

Question

Hi Experts,
when i select special stock = 'w' at the selection screen ,
all stock with 'w' and with blank will appear.
when i select special stock = blank , all stock with blank appear.
but i dunwan it to be like this.
i want it to be,
when i select special stock = 'w'. only 'w' stock will appear.
when i select special stock = 'blank'
all 'w' stock and blank stock will appear.
Can anyone please advise on this ?
Thank you in advanced.
Selection screen for user to select the option/condition
SELECTION-SCREEN BEGIN OF BLOCK 1 WITH FRAME TITLE TEXT-S01.
  SELECT-OPTIONS:  p_plant FOR MARC-WERKS,   "Plant
                   p_mcode FOR MCHB-MATNR,   "New Material code
                   p_ocode FOR MARA-BISMT,   "Old Material Code
                   p_mtype FOR MARA-MTART,   "Material Type
                   p_mgroup FOR MARA-MATKL,  "Material Group
                   p_sloc   FOR MCHB-LGORT,    "Storage Location
                   p_spec   FOR MSKU-SOBKZ.   "Special Stock
  PARAMETER:  c_rzero AS CHECKBOX DEFAULT 'X', "Remove zero qty item
              c_old AS CHECKBOX DEFAULT '',
              c_new AS CHECKBOX DEFAULT ''.
SELECTION-SCREEN END OF BLOCK 1.
Retrieve Material details
select p~werks m~matnr m~bismt m~mtart
  into corresponding fields of table it_mat
  from  ( marc as p inner join mara as m
  on p~matnr = m~matnr )
  where m~matnr in p_mcode
  and m~bismt in p_ocode
  and m~mtart in p_mtype
  and p~werks in p_plant
  and m~matkl in p_mgroup
  and p~mmsta ne '01'
  order by m~matnr ASCENDING.
  DELETE ADJACENT DUPLICATES FROM it_mat.
if p_spec[] is not initial.
  lv_special = '1'.
  endif.
  IF it_mat[] is not initial and lv_special = '1'.
SELECT werks matnr kulab sobkz charg FROM MSKU
  INTO CORRESPONDING FIELDS OF TABLE it_msku
  for all entries in it_mat
    WHERE matnr = it_mat-matnr
    AND werks IN p_plant
  AND sobkz  = 'W'.
  CLEAR: it_resultt, wa_resultt.
  endif.
if it_msku[] is not initial.
  loop at it_msku.
     it_collmsku-werks = it_msku-werks.
     it_collmsku-matnr = it_msku-matnr.
     it_collmsku-kulab = it_msku-kulab.
     it_collmsku-sobkz = it_msku-sobkz.
    collect it_collmsku.
    endloop.
    clear it_msku.
  endif.
LOOP AT it_mat.
  CLEAR: it_resultt, wa_resultt.
Retrieve related details from MARD/MCHB based on conditinos
  IF it_mat-sobkz = space.
    Select werks matnr FROM MARC
      APPENDING CORRESPONDING FIELDS OF TABLE it_resultt
      where matnr = it_mat-matnr
      and werks in p_plant.
      wa_resultt-ltab = 'MARC'.
      MODIFY it_resultt FROM wa_resultt TRANSPORTING ltab
      where matnr = it_mat-matnr
      and werks in p_plant.
  ENDIF.
  IF it_mat-xchpf = SPACE.
    SELECT werks matnr labst lgort lgpbe FROM MARD
    APPENDING CORRESPONDING FIELDS OF TABLE it_resultt
    WHERE matnr = it_mat-matnr
    AND werks IN p_plant
    AND lgort IN p_sloc.
    wa_resultt-ltab = 'MARD'.
    MODIFY it_resultt FROM wa_resultt TRANSPORTING ltab
    WHERE matnr = it_mat-matnr
    AND werks IN p_plant
    AND lgort IN p_sloc.
  ELSE.
    SELECT werks matnr charg clabs lgort FROM MCHB
    APPENDING CORRESPONDING FIELDS OF TABLE it_resultt
    WHERE matnr = it_mat-matnr
    AND werks IN p_plant
    AND lgort IN p_sloc.
    wa_resultt-ltab = 'MCHB'.
    MODIFY it_resultt FROM wa_resultt TRANSPORTING ltab
    WHERE matnr = it_mat-matnr
    AND werks IN p_plant
    AND lgort IN p_sloc.
  ENDIF.
Combine all related data into a record and keep in it_results
  LOOP AT it_resultt INTO wa_resultt.
    IF ( c_rzero = 'X' AND
       ( wa_resultt-clabs <> 0 OR wa_resultt-labst <> 0 ) )
       OR ( c_rzero <> 'X' ).
    Preparing data needed.----------
      l_count = l_count + 1.
      SELECT SINGLE maktx FROM MAKT
      INTO (l_maktx)
      WHERE matnr = wa_resultt-matnr.
      SELECT SINGLE umren umrez meinh FROM MARM
      INTO (l_umren, l_umrez, l_meinh)
      WHERE matnr = wa_resultt-matnr
      AND MEINH <> it_mat-meins.
    Alternative Qty
      l_alqty = l_umren / l_umrez * wa_resultt-clabs.
    retrieve stroge bin if it is not found, especially for MCHB
      IF wa_resultt-lgpbe IS INITIAL OR wa_resultt-lgpbe = ''.
        SELECT SINGLE lgpbe FROM MARD
        INTO l_lgpbe
        WHERE MATNR = wa_resultt-matnr
        AND WERKS = wa_resultt-werks
        AND LGORT = wa_resultt-lgort.
      ENDIF.
    Retrieve all details from MBEW & decide the qty
      IF wa_resultt-ltab = 'MARD'.
        SELECT SINGLE vprsv verpr stprs peinh salk3 FROM MBEW
        INTO (l_vprsv, l_verpr, l_stprs, l_peinh, l_salk3)
        WHERE MATNR = wa_resultt-matnr
        AND BWKEY = wa_resultt-werks.
        l_clabs = wa_resultt-labst.
      ELSE.
        IF it_mat-mtart = 'ROH'.
          SELECT SINGLE vprsv verpr stprs peinh salk3 FROM MBEW
          INTO (l_vprsv, l_verpr, l_stprs, l_peinh, l_salk3)
          WHERE MATNR = wa_resultt-matnr
          AND BWTAR = wa_resultt-charg.
        ELSEIF it_mat-mtart = 'FERT'.
          SELECT SINGLE vprsv verpr stprs peinh salk3 FROM MBEW
          INTO (l_vprsv, l_verpr, l_stprs, l_peinh, l_salk3)
          WHERE MATNR = wa_resultt-matnr
          AND BWKEY = wa_resultt-werks.
        ENDIF.
        l_clabs = wa_resultt-clabs.
            ENDIF.
    Both l_vprsv and l_stprs are also price, based on price control
    to decide which one to use
      IF l_vprsv <> 'V'.
        l_verpr = l_stprs.
      ENDIF.
      l_untpr = l_verpr / l_peinh.
      wa_resultt-BISMT = IT_MAT-BISMT.
      wa_resultt-sobkz = it_msku-sobkz.
      wa_resultt-kulab = it_msku-kulab.
      wa_resultt-matnr = it_mat-matnr.
    Insert data into work area
      wa_results-lcnt = l_count.
      wa_results-werks = wa_resultt-werks.
      wa_results-matnr = wa_resultt-matnr.
      wa_results-BISMT = wa_resultt-BISMT.
      wa_results-maktx = l_maktx.
      wa_results-mtart = it_mat-mtart.
      wa_results-matkl = it_mat-matkl.
      wa_results-charg = wa_resultt-charg.
      wa_results-clabs = l_clabs.
      wa_results-meins = it_mat-meins.
      wa_results-alqty = l_alqty.
      wa_results-meinh = l_meinh.
      wa_results-lgort = wa_resultt-lgort.
      wa_results-lgpbe = l_lgpbe.
      wa_results-vprsv = l_vprsv.
      wa_results-curr = 'MYR'.
      wa_results-price = l_verpr.
      wa_results-peinh = l_peinh.
      wa_results-untpr = l_untpr.
      wa_results-salk3 = l_salk3.
      wa_results-sobkz = wa_resultt-sobkz.
      wa_results-kulab = wa_resultt-kulab.
    Append work area into it_results
      APPEND wa_results TO it_results.
    ENDIF.
    CLEAR wa_results.
  ENDLOOP.
   IF lv_special = '1'.
    loop at it_results into wa_results.
      loop at it_collmsku where matnr = wa_results-matnr and werks = wa_results-werks.
        wa_results-sobkz = it_collmsku-sobkz.
          wa_results-kulab = it_collmsku-kulab.
          modify it_results from wa_results.
          clear wa_results.
        endloop.
      endloop.
    endif.

Answer 1

Hello
Modify select :
SELECT werks matnr kulab sobkz charg FROM MSKU
INTO CORRESPONDING FIELDS OF TABLE it_msku
for all entries in it_mat
WHERE matnr = it_mat-matnr
AND werks IN p_plant
AND sobkz IN p_spec.
In this case if you select special stock = 'w' at the selection screen, only 'w' stock will be appear.
And if you select special stock blank (p_cpec is initial), all stock will be appear.