Denkfehler?? Zwei Tabellen miteinander vermischen

Code: Alles auswählen.

  DATA stk_pos_tab  TYPE  zjm_pos_tab.
  DATA stk_felder TYPE  zjm_type_felder.
  DATA main_data  TYPE  zjm_feld_data.
  DATA main_data_t  TYPE  TABLE OF zjm_feld_data.
  DATA stk_zeilen TYPE  zjm_zeilen_tab.
  DATA stk_input LIKE LINE OF it_input.


  DATA pos_alt TYPE i.
  DATA anzahl_pos TYPE i.
  anzahl_pos = 1.
  DATA anzahl_zeilen TYPE i.
  anzahl_zeilen = 1.

*Feldinformationen Lesen
  SELECT * FROM zjm_feld_data INTO main_data.
    APPEND main_data TO main_data_t.
    SORT main_data_t BY zeile name ASCENDING .
  ENDSELECT.

  DATA it_data TYPE zjm_pos_name_value_tt.
  DATA stk_data TYPE zjm_pos_name_value.
  SELECT * FROM zjm_dummy_data INTO CORRESPONDING FIELDS OF TABLE it_data WHERE positions_art = 'DATEN'  .
  SORT it_data BY  zeile feld_name pos ASCENDING.
  

*Feldinformationen entsprechend umsetzen
  LOOP AT it_data INTO stk_input.

    READ TABLE main_data_t WITH KEY name = stk_input-feld_name INTO main_data.

    IF anzahl_zeilen NE main_data-zeile.
      APPEND stk_zeilen TO stk_pos_tab-zeile.
      anzahl_zeilen =  anzahl_zeilen + 1.
      CLEAR stk_zeilen-felder.
    ENDIF.

    IF  anzahl_pos NE stk_input-pos.
      APPEND stk_pos_tab TO et_pos_tab.
      anzahl_pos = anzahl_pos + 1.
      anzahl_zeilen = 1.
      CLEAR stk_zeilen-felder.
      CLEAR stk_pos_tab-zeile.
    ENDIF.

    stk_felder-feld_nr  = main_data-spalte.
    stk_felder-feld_name = main_data-name.
    stk_felder-type =  main_data-type.
    stk_felder-layout = main_data-layout_stil.
    stk_felder-wert = stk_input-value.

    APPEND stk_felder TO stk_zeilen-felder.
    SORT stk_zeilen-felder BY feld_nr ASCENDING.

  ENDLOOP.

*Ausnahme für letzte Zeile bzw. Position
  APPEND stk_zeilen TO stk_pos_tab-zeile.
  APPEND stk_pos_tab TO et_pos_tab.