MODIFY TABLE itab Problem

Code: Alles auswählen.

  IF NOT upload IS INITIAL.
    CLEAR ls_cuvtab_field.
    READ TABLE lt_vtzeile INTO ls_vtzeile INDEX 1.


    lv_zn = 1.

    DO 20 TIMES.

      CONCATENATE 'ls_vtzeile-feld' lv_zn INTO lv_feld.
      ASSIGN (lv_feld) TO <fs>.

      IF <fs> IS INITIAL.
        EXIT.
      ENDIF.
      READ TABLE lt_cabn INTO ls_cabn
        WITH KEY atnam = <fs>.
      IF sy-subrc <> 0.
        "Fehler: MM existiert nicht!
        EXIT.
      ENDIF.
      READ TABLE lt_cuvtab_field INTO ls_cuvtab_field
        WITH KEY atinn = ls_cabn-atinn.
      IF sy-subrc = 0.
        ls_cuvtab_field-DBFLD = 'x'.

        MODIFY TABLE lt_cuvtab_field FROM ls_cuvtab_field.
      ELSE.
        "FEHLERMELDUNG: Merkmal ist nicht in VT enthalten
      ENDIF.

      lv_zn = lv_zn + 1.
    ENDDO.

    READ TABLE lt_cuvtab_field WITH KEY dbfld = space TRANSPORTING NO FIELDS.

    IF sy-subrc = 0.
      "Fehlermeldung
    ENDIF.




  ENDIF.

Code: Alles auswählen.

      READ TABLE lt_cuvtab_field INTO ls_cuvtab_field
        WITH KEY atinn = ls_cabn-atinn.
      IF sy-subrc = 0.
        ls_cuvtab_field-DBFLD = 'x'.

        MODIFY TABLE lt_cuvtab_field FROM ls_cuvtab_field index sy-tabix.
      ELSE.
        "FEHLERMELDUNG: Merkmal ist nicht in VT enthalten
      ENDIF.

Code: Alles auswählen.

REPORT  ztest98.
DATA lt_sflight TYPE TABLE OF sflight.
DATA ls_sflight TYPE sflight.

SELECT * FROM sflight INTO TABLE lt_sflight.


LOOP AT lt_sflight INTO ls_sflight.

  IF ls_sflight-carrid = 'DL'.

    ls_sflight-connid = '777'.

    MODIFY lt_sflight FROM ls_sflight INDEX sy-tabix .

  ENDIF.

ENDLOOP.

Code: Alles auswählen.

FIELD-SYMBOLS <ls> TYPE sflight.

SELECT * FROM sflight INTO TABLE lt_sflight.

LOOP AT lt_sflight ASSIGNING <ls>.

  IF <ls>-carrid = 'DL'.
    <ls>-connid = '777'.

* wird nicht mehr gebraucht !
*    MODIFY lt_sflight FROM ls_sflight INDEX sy-tabix .

  ENDIF.


ENDLOOP.