Add/Change Column Name on Internal Table ALV

Question

What I need is to add titles to these two columns (highlighted in yellow) and I don't know how to do that.

FORM display_alv. 
    DATA: gr_functions TYPE REF TO cl_salv_functions.
    DATA: gr_display TYPE REF TO cl_salv_display_settings.    
    DATA: gr_columns TYPE REF TO cl_salv_columns_table.    
    DATA: gr_column TYPE REF TO cl_salv_column_table.    
    DATA: gr_sorts TYPE REF TO cl_salv_sorts.    
    DATA: gr_agg TYPE REF TO cl_salv_aggregations.    
    DATA: gr_selections TYPE REF TO cl_salv_selections.

    gr_functions = alv->get_functions( ).    
    gr_functions->set_all( abap_true ).

    gr_display = alv->get_display_settings( ).    
    gr_display->set_striped_pattern( cl_salv_display_settings=>true ).    
    gr_display->set_list_header( 'Relatório RVs' ).

    gr_columns = alv->get_columns( ).    
    gr_columns->set_optimize( 'X' ).    
    gr_columns = alv->get_columns( ).

    gr_column ?= gr_columns->get_column( 'revenue' ).    
    gr_column->set_short_text( 'Revenue' ).    
    gr_column->set_medium_text( 'Revenue' ).

    alv->display( ).
ENDFORM.`

Answer 1

The syntax for some of these ALV methods are pretty finicky. I'm pretty sure that your code is right, except that revenue needs to be in all caps. See the example below:

alv->get_columns( )->get_column( 'REVENUE' )->set_short_text( 'Revenue' ) ##NO_TEXT.
alv->get_columns( )->get_column( 'REVENUE' )->set_medium_text( 'Revenue ) ##NO_TEXT.
alv->get_columns( )->get_column( 'REVENUE' )->set_long_text( 'Revenue' ) ##NO_TEXT.