Read MARA characteristics in mass

The code below shows how to retrieve a characteristic value in mass.
The characteristic in example is named INDICE.

*&---------------------------------------------------------------------*
*&      Form  retrieve_indice
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*      -->PI_MATNR           text
*      <--PI_INDICES_SORTED  text
*----------------------------------------------------------------------*
FORM retrieve_indice  USING    pi_matnr   TYPE TDT_MATNR
                      CHANGING pi_indices TYPE ti_indices.

  " DECLARED TYPES in TOP include
  " =============================
  TYPES : BEGIN OF ts_indices,
            matnr       TYPE matnr,
            atwrt       TYPE atwrt,
          END OF ts_indices,

          ti_indices TYPE TABLE OF ts_indices.
  " =============================

  DATA : lw_atinn        TYPE atinn.

  CHECK pi_matnr IS NOT INITIAL.

  CALL FUNCTION 'CONVERSION_EXIT_ATINN_INPUT'
    EXPORTING
      input  = 'INDICE'  " <== Name of charac to be changed here 
    IMPORTING
      output = lw_atinn.


  SELECT mara~matnr ausp~atwrt
     INTO TABLE pi_indices
     FROM mara INNER JOIN inob
       ON mara~matnr EQ inob~objek
     INNER JOIN ausp
       ON inob~cuobj EQ ausp~objek
     FOR ALL entries IN pi_matnr
    WHERE mara~matnr EQ pi_matnr-table_line
      AND inob~klart EQ '300'  " <=== Classification number (only if known)
      AND inob~obtab EQ 'MARA'
      AND ausp~atinn EQ lw_atinn.

  IF sy-subrc <> 0.
    CLEAR pi_indices.
  ENDIF.

ENDFORM.                    " retrieve_indice