Anzahl Komponente einer Struktur bei z.B Typen "STANDARD TABLE" bekommen

DATA: lv_count TYPE i,
lv_count = 1.
READ TABLE it_data ASSIGNING FIELD-SYMBOL(<ls_itab>) INDEX 1.
DO.
 ASSIGN COMPONENT lv_count OF STRUCTURE <ls_itab> TO FIELD-SYMBOL(<ls_comp>).
 IF sy-subrc = 0.
  lv_count = lv_count + 1.
 ELSE.
  lv_count = lv_count - 1.
  EXIT.
 ENDIF.
ENDDO.