DIFFERENCE BETWEEN "AT NEW " AND "AT FIRST" , "AT END OF" AND "AT LAST" ?

WHAT IS THE DIFFERENCE BETWEEN "AT NEW " AND "AT FIRST" , "AT END OF" AND "AT LAST" WITH REFERENCE TO CONTROL BREAK STATEMENTS ? PLEASE EXPLAIN IN DETAIL.
BEST REGARDS
RYAN.

Hi
i am sending you a simple program in which i had write program on that events
you can understand very easily
Using AT FIRST , AT NEW, AT THE END OF , AT LAST.
DATA: BEGIN OF ITAB OCCURS 0,
 F1 TYPE I,
 F2(6) TYPE C,
 F3(10) TYPE N,
 F4(16) TYPE P DECIMALS 2,
 END OF ITAB.
DATA: SUB_TOT(10) TYPE P DECIMALS 3.
**--1
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 30.
ITAB-F4 = '3000.00'.
APPEND ITAB.
CLEAR ITAB.
*--2
ITAB-F1 = 2.
ITAB-F2 = 'TWO'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 2.
ITAB-F2 = 'TWO'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
*-- 3
ITAB-F1 = 3.
ITAB-F2 = 'THREE'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 3.
ITAB-F2 = 'THREE'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
SORT ITAB BY F1.
LOOP AT ITAB.
AT FIRST.
WRITE: /35 ' MATERIAL DETAILS:'.
ULINE.
ENDAT.
AT NEW F1.
WRITE: / 'DETAILS OF MATERIAL:' COLOR 7 , ITAB-F1.
ULINE.
ENDAT.
WRITE: / ITAB-F1, ITAB-F2, ITAB-F3, ITAB-F4.
SUB_TOT = SUB_TOT + ITAB-F4.
AT END OF F1.
ULINE.
WRITE: / 'SUB TOTAL :' COLOR 3 INVERSE ON, SUB_TOT COLOR 3 INVERSE ON.
CLEAR SUB_TOT.
ENDAT.
AT LAST.
SUM.
ULINE.
WRITE: 'SUM:', ITAB-F4.
ULINE.
ENDAT.
ENDLOOP.
Using AT FIRST , AT NEW, AT THE END OF , AT LAST.
DATA: BEGIN OF ITAB OCCURS 0,
 F1 TYPE I,
 F2(6) TYPE C,
 F3(10) TYPE N,
 F4(16) TYPE P DECIMALS 2,
 END OF ITAB.
DATA: SUB_TOT(10) TYPE P DECIMALS 3.
**--1
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 30.
ITAB-F4 = '3000.00'.
APPEND ITAB.
CLEAR ITAB.
*--2
ITAB-F1 = 2.
ITAB-F2 = 'TWO'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 2.
ITAB-F2 = 'TWO'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
*-- 3
ITAB-F1 = 3.
ITAB-F2 = 'THREE'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 3.
ITAB-F2 = 'THREE'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
SORT ITAB BY F1.
LOOP AT ITAB.
AT FIRST.
WRITE: /35 ' MATERIAL DETAILS:'.
ULINE.
ENDAT.
AT NEW F1.
WRITE: / 'DETAILS OF MATERIAL:' COLOR 7 , ITAB-F1.
ULINE.
ENDAT.
WRITE: / ITAB-F1, ITAB-F2, ITAB-F3, ITAB-F4.
SUB_TOT = SUB_TOT + ITAB-F4.
AT END OF F1.
ULINE.
WRITE: / 'SUB TOTAL :' COLOR 3 INVERSE ON, SUB_TOT COLOR 3 INVERSE ON.
CLEAR SUB_TOT.
ENDAT.
AT LAST.
SUM.
ULINE.
WRITE: 'SUM:', ITAB-F4.
ULINE.
ENDAT.
ENDLOOP.
Reward if usefull

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Difference between At new and on change statement?

What is the difference between at new and on change statement? Please explain with an example.

hi
on change of differs from at new in the following respects:
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Difference between AT NEW and ON CHANGE

difference between AT NEW and ON CHANGE

HI,
at new is controlbreak statment and on change of is not and we can use onchange of out side the loop
and on at nnwe the left side feild change the event
trigers and the values become 0 and *
-->1.It can be used in any loop construct, not just loop at.
For example, it can be used within select and endselect, do
and enddo, or while and endwhile, as well as inside get events.
2. A single on change of can be triggered by a change within
one or more fields named after of and separated by or. These
fields can be elementary fields or field strings. If you are
within a loop, these fields do not have to belong to the loop.
3.When used within a loop, a change in a field to the left
of the control level does not trigger a control break.
4.When used within a loop, fields to the right still contain
their original values; they are not changed to contain zeros
or asterisks.
5.You can use else between on change of and endon.
6.You can use it with loop at it where . . ..
7. You can use sum with on change of. It sums all numeric
fields except the one(s) named after of.
8.Any values changed within on change of remain changed
after endon. The contents of the header line are not
restored as they are for at and endat
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difference between AT NEW and ON Change events..
Thanks

Hi
AT NEW
|{END OF} comp
Beginning or end of a group of lines with the same content in the component comp1 comp2 ... and in the components to the left of comp1 comp2 .... The components comp1 comp2 ... can be specified, as described in the section Specification of Components, with the limitation that access to object attributes is not possible here.
ON CHANGE OF
ON CHANGE OF dobj [OR dobj1 [OR dobj2] ... ].
statement_block
ENDON.
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This control structure, which is forbidden in classes, is particularly prone to errors and should be replaced by branches with explicitly declared auxiliary variables.
example:-
Using AT FIRST , AT NEW, AT THE END OF , AT LAST.
DATA: BEGIN OF ITAB OCCURS 0,
 F1 TYPE I,
 F2(6) TYPE C,
 F3(10) TYPE N,
 F4(16) TYPE P DECIMALS 2,
 END OF ITAB.
DATA: SUB_TOT(10) TYPE P DECIMALS 3.
**--1
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 1.
ITAB-F2 = 'ONE'.
ITAB-F3 = 30.
ITAB-F4 = '3000.00'.
APPEND ITAB.
CLEAR ITAB.
*--2
ITAB-F1 = 2.
ITAB-F2 = 'TWO'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 2.
ITAB-F2 = 'TWO'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
*-- 3
ITAB-F1 = 3.
ITAB-F2 = 'THREE'.
ITAB-F3 = 10.
ITAB-F4 = '1000.00'.
APPEND ITAB.
CLEAR ITAB.
ITAB-F1 = 3.
ITAB-F2 = 'THREE'.
ITAB-F3 = 20.
ITAB-F4 = '2000.00'.
APPEND ITAB.
CLEAR ITAB.
SORT ITAB BY F1.
LOOP AT ITAB.
AT FIRST.
WRITE: /35 ' MATERIAL DETAILS:'.
ULINE.
ENDAT.
AT NEW F1.
WRITE: / 'DETAILS OF MATERIAL:' COLOR 7 , ITAB-F1.
ULINE.
ENDAT.
WRITE: / ITAB-F1, ITAB-F2, ITAB-F3, ITAB-F4.
SUB_TOT = SUB_TOT + ITAB-F4.
AT END OF F1.
ULINE.
WRITE: / 'SUB TOTAL :' COLOR 3 INVERSE ON, SUB_TOT COLOR 3 INVERSE ON.
CLEAR SUB_TOT.
ENDAT.
AT LAST.
SUM.
ULINE.
WRITE: 'SUM:', ITAB-F4.
ULINE.
ENDAT.
ENDLOOP.

Difference btwn at new and on change of

Hi all,
can i know the difference between 'at new' and 'on change of'.

Hi,
at new - > means inside the loop, the new value.
eg :
1
1
2
3
4
5
5
loop at itab
at new matnr
write matnr.
end at.
end loop.
1
2
3
4
5
On change of -> chnage of particular value inside the loop.
The Major Difference is :
a) When AT NEW occurs,
the alpha-numeric fields have ******* in their value,
b) where as in case of ON CHANGE,
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of that particular record,
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1.It can be used in any loop construct, not just loop at. For example, it can be used within select and endselect, do and enddo, or while and endwhile, as well as inside get events.
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5.You can use else between on change of and endon.
6.You can use it with loop at it where . . ..
7.You can use sum with on change of. It sums all numeric fields except the one(s) named after of.
8.Any values changed within on change of remain changed after endon. The contents of the header line are not restored as they are for at and endat.
while
AT NEW can be used only within a loop of an INTERNAL TABLE..
5. Sample program to get the taste of it
(just copy paste)
6.
REPORT ABC.
DATA : BEGIN OF ITAB OCCURS 0,
bukrs like t001-bukrs,
f1(10) type c,
end of itab.
itab-bukrs = '1000'.
itab-f1 = '1111111'.
append itab.
itab-bukrs = '1100'.
itab-f1 = '3333333'.
append itab.
itab-bukrs = '1200'.
itab-f1 = '555555'.
append itab.
AT NEW
loop at itab.
at new bukrs.
write :/ itab-bukrs , itab-f1.
endat.
endloop.
AT ONCHANGE
loop at itab.
ON CHANGE OF ITAB-BUKRS.
write :/ itab-bukrs , itab-f1.
ENDON.
Regards,
Ferry Lianto

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DIFFERENCE BETWEEN "AT NEW " AND "AT FIRST" , "AT END OF" AND "AT LAST" ?

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