Newly added field not getting displayed in ALV output

Question

Hi All,
   I'm adding one more field/column to be displayed in an old existing program that uses REUSE_ALV_FIELDCATALOG_MERGE to generate the ALV fieldcat.
DATA: BEGIN OF it_salary OCCURS 0,
        pernr LIKE pa0000-pernr,
        ename LIKE pa0001-ename,
        rtext like lv_rtext, -
added field
        waers LIKE pa0008-waers
  CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
    EXPORTING
      i_program_name         = driver
      i_internal_tabname     = 'IT_SALARY'
      i_client_never_display = 'X'
      i_inclname             = driver
    CHANGING
      ct_fieldcat            = lv_fieldcat[]
    EXCEPTIONS
      inconsistent_interface = 1
      program_error          = 2
      OTHERS                 = 3.
  CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
    EXPORTING
      i_callback_program      = driver
      it_fieldcat             = lv_fieldcat[]
      i_default               = 'X'
      i_save                  = 'A'
      is_variant              = lv_tmplt
      is_layout               = lv_ls_layout
     i_callback_user_command = 'USER_COMMAND'
    TABLES
      t_outtab                = it_salary
    EXCEPTIONS
      program_error           = 1
      OTHERS                  = 2.
The newly added field is not getting populated in the lv_fieldcat table. Tried running programs BALVBUFDEL,
BCALV_BUFFER_DEL_SHARED then logging off and logging in but of no help.
Please provide suggestion for this issue.
Regards,
Sridevi S

Answer 1

Hi,
Fieldcat is buffered - so use
I_BYPASSING_BUFFER = 'X'
Since a while CL_GUI_ALV_GRID is available which does NOT need any fieldcat (is determined internally using RTTI). It is worth playing around whith this class if you have some time. This class is recommended for ALV Output by SAP (but no edit is possible - was never supported officially).
A simple use would be:
data: gt_output type standard table of (adjust!).
*simple ALV output
data go_alv type ref to cl_salv_table.
data go_functions type ref to cl_salv_functions_list.
data go_columns type ref to cl_salv_columns_table.
data go_column type ref to cl_salv_column_table.
*Exceprion handlig
data: go_exception  type ref to cx_root,
      gv_errortext   type string.
** fill table gt_output ...
** ALV output
if not gt_output is initial.
    try.
        call method cl_salv_table=>factory
          importing
            r_salv_table = go_alv
          changing
            t_table      = gt_output.
      catch cx_salv_msg into go_exception.
        gv_errortext = go_exception->get_text( ).
        message gv_errortext type 'A'.
    endtry.
* enable all standard ALV functions
    go_functions =  go_alv->get_functions( ).
    go_functions->set_all( ).
* hide MANDT
    go_columns = go_alv->get_columns( ).
    go_column ?=  go_columns->get_column( columnname = 'MANDT' ).
    go_column->set_technical( ).
    go_alv->display( ).
Kind regards,
Holger