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DEFINE _get_range_from_table.

  LOOP AT &2 ASSIGNING <lfs_struct>.

    ASSIGN COMPONENT &3 OF STRUCTURE <lfs_struct> TO <lfs_field>.
    CHECK sy-subrc IS INITIAL.

    APPEND VALUE #( sign = 'I' option = 'EQ' low = <lfs_field> ) TO &1.

  ENDLOOP.

  SORT &1 BY low.
  DELETE ADJACENT DUPLICATES FROM &1 COMPARING low.

END-OF-DEFINITION.


ESEMPIO DI APPLICAZIONE

  _get_range_from_table lr_belnr lt_data 'BELNR'.
  _get_range_from_table lr_gjahr lt_data 'GJAHR'.
  _get_range_from_table lr_bukrs lt_data 'BUKRS'.
  _get_range_from_table lr_buzei lt_data 'BUZEI'.