get SALV columns in wrong order

[jan_dahl]

Hi folks

I'm building a header line from my SALV table to use it in my CSV-File by this method.

  METHOD get_headerline_from_salv.
* build a header line
    LOOP AT i_salv->get_columns(  )->get( ) INTO DATA(ls_col).
      r_result = |{ r_result }{ ls_col-r_column->get_long_text(  ) }{ i_sep }|.
    ENDLOOP.
  ENDMETHOD.

Most of the time this works fine, especially when I debug and try to find the bug it is always perfectly fine. But if I don't watch, sometimes the colums are in a wrong order?!?

Any idea why? What can I do about it?

Cheers Jan

[thkolz]

It's really strange that this is not stable.
I would rather start from the table (VBAK in my example) and use the technical field names...

DATA: r_type_desr TYPE REF TO cl_abap_structdescr,
      s_vbak      TYPE vbak,
      v_string    TYPE string.

r_type_desr ?= cl_abap_typedescr=>describe_by_data( s_vbak ).

LOOP AT r_type_desr->components INTO DATA(s_components).
  IF v_string IS INITIAL.
    v_string = s_components-name.
  ELSE.
    v_string = |{ v_string }', '{ s_components-name }|.
  ENDIF.
ENDLOOP.

WRITE v_string.

[Sandra_Rossi]

Weird. Check the SAP notes.

(but I would think that you are in a special case, but I can't say without any further description/steps to reproduce)