What is the exact purpose of At New Commanad

Question

What is the exact purpose of At New Commanad.
Ex: At New VBELN
Thanx in Advance.
Akshitha.

Answer 1

Hi Akshitha,
Variant 1
AT NEW f.
Variant 2
AT END OF f.
Effect
f is a field from the field group HEADER . The enclosed sequence of statements is executed if
the field f occurs in the sort key of the extract dataset (and thus also in the field group HEADER ) and
the field f or a superior sort criterion has a different value in the current LOOP line than in the prceding ( AT NEW ) or subsequent ( AT END OF ) record of the extract dataset.
Example
DATA: NAME(30),
      SALES TYPE I.
FIELD-GROUPS: HEADER, INFOS.
INSERT: NAME  INTO HEADER,
        SALES INTO INFOS.
LOOP.
  AT NEW NAME.
    NEW-PAGE.
  ENDAT.
  AT END OF NAME.
    WRITE: / NAME, SUM(SALES).
  ENDAT.
ENDLOOP.
Notes
If the extract dataset is not sorted before processing with LOOP , no control level structure is defined and the statements following AT NEW or AT END OF are not executed.
Fields which stand at hex zero are ignored by the control break check with AT NEW or AT END OF . This corresponds to the behavior of the SORT statement, which always places unoccupied fields (i.e. fields which stand at hex zero) before all occupied fields when sorting extract datasets, regardless of whether the sort sequence is in ascending or descending order.