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In fields with fixed value domains the description can be output instead of the code. Use the constant if_salv_gui_types_ida=>cs_presentation_mode -description

Interface Method
IF_SALV_GUI_FIELD_DISPLAY_OPT set_formatting

You can retrieve interface IF_SALV_GUI_FIELD_DISPLAY_OPT using:

Interface Method
IF_SALV_GUI_FIELD_CATALOG_IDA display_options
Example 
DATA lo_alv_display TYPE REF TO if_salv_gui_table_ida .

* create ALV interface
  lo_alv_display = cl_salv_gui_table_ida => create(
iv_table_name = 'SBOOK'
) .

* Show description for field SMOKER
  lo_alv_display->field_catalog ( )->display_options ( )->set_formatting(
iv_field_name = 'SMOKER'iv_presentation_mode = if_salv_gui_types_ida =>cs_presentation_mode -description
) .


Report example: SALV_IDA_FIELD_DISPLAY_OPT_FS

Note If the sort order of the internal codes is different to the descriptions, you should consider deactivating sorting for the field. There may be unexpected results with the sorting and with range entries in the filter dialog.

If sorting for the field has been deactivated with interface IF_SALV_GUI_FIELD_CATALOG_IDA, method DISABLE_SORT, then input of ranges is suppressed in the filter dialog.