i have an itab of following structure. i want to call a subroutine whenever the field "lifnr" change.
DATA : BEGIN OF int_fdata OCCURS 0,
lifnr LIKE ekko-lifnr,
bsart LIKE ekko-bsart,
ekorg LIKE ekko-ekorg,
ekgrp LIKE ekko-ekgrp,
bukrs LIKE ekko-bukrs,
ebelp LIKE ekpo-ebelp,
END OF int_fdata.
how to do it? can i use "AT NEW LIFNR.".