Hiding a column in ALV GRID function module if it doesnt have data

Question

Hi ,
I am using alv grid function module, in output i dont want to display the fields which dont have data

Answer 1

we dont know which column has no data..... we have to do it dynamically
This code does that dynamically, Here the field2 & Fiels4 are not displayed.
TYPE-POOLS:slis,abap.
TYPES:BEGIN OF ty_stru,
      field1 TYPE c,field2 TYPE c,field3 TYPE c,field4 TYPE c,
      END OF ty_stru.
DATA:itab TYPE TABLE OF ty_stru,
     wa_stru TYPE ty_stru,
     lv_repid TYPE sy-repid,
     wa_fieldcat TYPE slis_fieldcat_alv,
     it_fieldcat TYPE TABLE OF slis_fieldcat_alv,
     it_details TYPE abap_compdescr_tab,
     wa_components TYPE abap_compdescr,
     lf_ref_descr TYPE REF TO cl_abap_structdescr,
     lv_field TYPE abap_compname.
FIELD-SYMBOLS:<fs> TYPE ANY,
              <fs1> TYPE ANY.
lf_ref_descr ?= cl_abap_typedescr=>describe_by_data( wa_stru ).
it_details[] = lf_ref_descr->components[].
wa_stru-field1 = 'A'.wa_stru-field3 = 'C'.APPEND wa_stru TO itab.
wa_stru-field1 = 'X'.wa_stru-field3 = 'Y'.APPEND wa_stru TO itab.
IF NOT itab[] IS INITIAL.
  LOOP AT it_details INTO wa_components.
    ASSIGN wa_components-name TO <fs>.
    CHECK sy-subrc = 0.
    SORT itab BY (<fs>) DESCENDING.
    CONCATENATE 'WA_STRU' '-' <fs> INTO lv_field .
    ASSIGN (lv_field) TO <fs1>.
    CHECK sy-subrc = 0.
    READ TABLE itab INTO wa_stru INDEX 1 TRANSPORTING (<fs>).
    IF sy-subrc = 0 AND ( NOT <fs1> IS INITIAL ).
      wa_fieldcat-fieldname = wa_components-name.
      wa_fieldcat-seltext_m = wa_components-name.
      APPEND wa_fieldcat TO it_fieldcat.
      CLEAR wa_fieldcat.
    ENDIF.
  ENDLOOP.
  lv_repid = sy-repid.
  CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
       EXPORTING
            i_callback_program = lv_repid
            it_fieldcat        = it_fieldcat[]
       TABLES
            t_outtab           = itab[].
ENDIF.