What is the perfect defference between AT NEW and ON CHANGE...

What is the perfect defference between AT NEW and ON CHANGE...?

hi vijay,
if u use 'at-new' statement , basically it dont pick first record of the itab where as 'on chage of' can pick from first record.
all these control brake statements can work with header line except 'on change of' event.
regards..
seshu.
Jogdand M B
Hi,
At New.
Effect
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.
Example:
LOOP AT itab result ...
    [AT NEW comp1.
     ENDAT.
endloop.
On Change of:
Effect:
The statements ON CHANGE OF and ENDON, which are forbidden in classes, define a control structure that can contain a statement block statement_block. After ON CHANGE OF, any number of data objects dobj1, dobj2... of any data type can be added..
Example:
In a SELECT loop, a statement block should only be executed if the content of the column CARRID has changed.
DATA spfli_wa TYPE spfli.
SELECT *
       FROM spfli
       INTO spfli_wa
       ORDER BY carrid.
ON CHANGE OF spfli_wa-carrid.
ENDON.
ENDSELECT.

Similar Messages

What is the exact diff between At New and On Chnage

hello all
what is the exact diff between At New and On Chnage in control breaks statements. and when shall we go for At new & when shall we go for On change on events.
Plz tell with with some code.

Hi ,
Using at new
Each time the value of c changes, the lines of code between at new and endat are executed. This block is also executed during the first loop pass or if any fields to the left of c change. Between at and endat, the numeric fields to the right of c are set to zero. The non-numeric fields are filled with asterisks (*). If there are multiple occurrences of at new, they are all executed. at end of behaves in a similar fashion.
Using the on change of Statement
Another statement you can use to perform control break processing is on change of. It behaves in a manner similar to at new.
The following points apply:
u2022     If the value of any of the variables (v1, v2, and so on) changes from one test to the next, the statements following on change of are executed.
u2022     If no change is detected and else is specified, the statements following else are executed.
on change of differs from at new in the following respects:
u2022     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.
u2022     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.
u2022     When used within a loop, a change in a field to the left of the control level does not trigger a control break.
u2022     When used within a loop, fields to the right still contain their original values; they are not changed to contain zeros or asterisks.
u2022     You can use else between on change of and endon.
u2022     You can use it with loop at it where . . ..
u2022     You can use sum with on change of. It sums all numeric fields except the one(s) named after of.
u2022     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.
Regards,
KV

Difference between At-new and on change of

Hi,
Can anyone send me the exact difference between At-new and On change of
Thank You
Santosh

Hi anjali,
I just entered your subject "difference between At-new and on change of" as search terms in the SEARCH FORUM input field.
Please check the results and come back after.
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Posted on: 28.09.2006 19:01, by user: subhash soni -- Relevance: 100% -- Show all results within this thread
Hi What is the difference between At new and On change of? Thank You
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Posted on: 09.03.2007 20:16, by user: anjali nalluri -- Relevance: 89% -- Show all results within this thread
Hi, Can anyone send me the exact difference between At-new and On change of Thank You Santosh
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hi, can any one tell me what is the exact difference between AT new and on change of thanks pavan ...
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Hi, Could anybody exlain the difference between At New event and On Change Of event in detail? And how can we avoid the inner loops ...
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Hi all, what is the main diff between at new and on change of statements. Regards Saroja.
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Posted on: 06.05.2006 10:55, by user: Raja Sekhar T -- Relevance: 44% -- Show all results within this thread
Hi, Differnce between AT NEW AND ON CHANGE OF Iam waiting foryour reply Thanks & Regards Raja Sekhar.T ...
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Hi Friends what are the actual differences between AT NEW & ON CHANGE

what are the actual differences between AT NEW & ON CHANGE ? can you list some of the differences?

Hi,
At New
1. When a new record comes at new triggers. Atnew only used inside loop and endloop.
2. At new is controlbreak statment on at new the left side field change, the event
trigers and the values become 0 and *
On Change
1. On change of works same like at-new but the diff is it can be used out side of a loop,like select and endselect,case endcase.
2.. on change of is not a control break statement and we can use onchange of out side the loop
and
The Major difference between the two is that AT NEW can be used ONLY for INTERNAL TABLES, while ON CHANGE OF can be used for any loop processing i.e do..enddo, while..endwhile and loop..endloop also.
AT NEW <field>
The block will be executed when the SY-TABIX is 1 (or) when the SY-TABIX 1 value has a change with the SY-TABIX value.
With this block the field towards the right to the field are not accessable with in the block, and are shown with '*'. They can be accessed outside the block.
ON CHANGE OF <itab>-<field>
The block also works similar to the AT First. In this block all the fields are accesseble.
ON CHANGE OF triggers whenever there is a change in that particular field.
AT NEW triggers whenever there is a change in the fields before that particular field.ie. if there is a change in that combinations from the first field.
On change off' works on variabels. The 1st time the statement isreached a memory copy is made of the value. The next time the statementis reached, the current value is compared to the stored value. If thereis a difference, the coding between ON... and ENDON. is executed. Youcan use this for a table workarea field, but if you have the table loopin a routine and the routine called several times, you can get unwantedresults. (Check the value of the last loop with the value of the firstnew loop.)
The AT NEW (and others like AT END OF...) are specially for table loopprocessing. The coding between AT new FIELD and ANDAT is triggerdwhenever a the field or any field defined to the left is changed. Yourtable should be sorted by all fields from the left up to the consideredFIELD. Btw all fields to the right contain *, so it can be usefull tohave a second workarea filled to be printed or what ever you want.
REWARD IF HELPFUL
RAAM

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Hi,
Good morning and greetings,
Please use the following link
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Please reward points if found useful
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With kindest regards
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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:
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.
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.
When used within a loop, a change in a field to the left of the control level does not trigger a control break.
When used within a loop, fields to the right still contain their original values; they are not changed to contain zeros or asterisks.
You can use else between on change of and endon.
You can use it with loop at it where . . ..
You can use sum with on change of. It sums all numeric fields except the one(s) named after of.
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.
REGARDS
PRASANTH

Differnce between AT NEW AND ON CHANGE OF

Hi,
Differnce between AT NEW AND ON CHANGE OF
Iam waiting foryour reply
Thanks & Regards
Raja Sekhar.T

Hai Raja
check the following Documents
1. AT NEW f.
2. AT END OF f.
3. AT FIRST.
4. AT LAST.
5. AT fg.
Effect
In a LOOP which processes a dataset created with EXTRACT , you can use special control structures for control break processing. All these structures begin with AT and end with ENDAT . The sequence of statements which lies between them is then executed if a control break occurs.
You can use these key words for control break processing with extract datasets only if the active LOOP statement is proceesing an extract dataset.
The control level structure with extract datasets is dynamic. It corresponds exactly to the sort key of the extract dataset, i.e. to the order of fields in the field group HEADER by which the extract dataset was sorted .
At the end of a control group ( AT END OF , AT LAST ), there are two types of control level information between AT and ENDAT :
If the sort key of the extract dataset contains a non-numeric field h (particularly in the field group HEADER ), the field CNT(h) contains the number of control breaks in the (subordinate) control level h .
For extracted number fields g (see also ABAP/4 number types ), the fields SUM(g) contain the relevant control totals.
Notes
The fields CNT(h) and SUM(g) can only be addressed after they have been sorted. Otherwise, a runtime error may occur.
The fields CNT(h) and SUM(g) are filled with the relevant values for a control level at the end of each control group ( AT END OF , AT LAST ), not at the beginning ( AT FIRST , AT NEW ).
When calculating totals with SUM(g) , the system automatically chooses the maximum field sizes so that an overflow occurs only if the absolute value area limits are exceeded.
You can also use special control break control structures with LOOP s on internal tables.
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.
Variant 3
AT FIRST.
Variant 4
AT LAST.
Effect
Executes the relevant series of statements just once - either on the first loop pass (with AT FIRST ) or on the last loop pass (with AT LAST ).
Variant 5
AT fg.
Addition
... WITH fg1
Effect
This statement makes single record processing dependent on the type of extracted record.
The sequence of statements following AT fg are executed whenever the current LOOP record is created with EXTRACT fg (in other words: when the current record is a fg record).
Addition
... WITH fg1
Effect
Executes the sequence of statements belonging to AT fg WITH fg1 only if the record of the field group fg in the dataset is immediately followed by a record of the field group fg1 .
Basic form
ON CHANGE OF f.
Addition
... OR f1
Effect
Executes the processing block enclosed by the " ON CHANGE OF f " and " ENDON " statements whenever the contents of the field f change (control break processing).
Normally, you use the statement to manipulate database fields during GET events or SELECT / ENDSELECT processing.
Note
There are special control structures for processing control breaks in LOOP s on internal tables or extract datasets AT ).
ON CHANGE OF is unsuitable for recognizing control levels in loops of this type because it always creates a global auxiliary field which is used to check for changes. This global auxiliary field can only be changed in the relevant ON CHANGE OF statement. It is not reset when the processing goes into loops or subroutines, so unwanted effects can occur if the loop or subroutine is executed again. Also, since it is set to its initial value when created (like any other field), any ON CHANGE OF processing will be executed after the first test, unless the contents of the field concerned happen to be identical to the initial value.
Example
TABLES T100.
SELECT * FROM T100 WHERE SPRSL = SY-LANGU AND
 MSGNR < '010'
 ORDER BY PRIMARY KEY.
ON CHANGE OF T100-ARBGB.
 ULINE.
 WRITE: / '**', T100-ARBGB, '**'.
ENDON.
WRITE: / T100-MSGNR, T100-TEXT.
ENDSELECT.
Displays all messages with their numbers in the logon language, provided the number is less than '010'.
Each time the message class changes, it is output.
Addition
... OR f1
Effect
Also executes the code whenever the contents of the field f1 changes.
You can use this addition several times.
Example
Logical database F1S
TABLES: SPFLI, SFLIGHT, SBOOK.
GET SBOOK.
ON CHANGE OF SPFLI-CARRID OR
 SPFLI-CONNID OR
 SFLIGHT-FLDATE.
 ULINE.
 WRITE: /5 SPFLI-CARRID, SPFLI-CONNID,
 5 SFLIGHT-FLDATE, SPFLI-FLTIME,
 5 SFLIGHT-SEATSMAX, SFLIGHT-SEATSOCC.
ENDON.
WRITE: / SBOOK-CUSTOMID.
The code between ON CHANGE OF and ENDON is executed only if at least one of the fields SPFLI-CARRID , SPFLI-CONNID or SFLIGHT-FLDATE has changed, i.e. there is a different flight connection (which also has bookings).
Notes
Thanks & regards
Sreenivasulu P

What are the major differences between hana 2013 and 2014 release

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Please help me....thank you in advance.
Regards,
Tapas

Hi,
Good morning and greetings,
Please use the following link
http://solutionbrowser.erp.sap.fmpmedia.com
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Thanking you
With kindest regards
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Hi,
I have awarded you both with the 'correct answer'.
I went through, painstakingly, the documents I was linked to above and compared.
In the end the major differences are pretty much what you have outlined here - which is exactly what I wanted.
Thank you both very much.
Cheers,
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V7
V8
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No
Yes
Available in   an Appliance Model
No
Yes
Read-only access to Cisco Unified Contact Center Express   database (Informix) with JDBC, ODBC, or Structured Query Language (SQL)
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Yes
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MS Windows Server   2003
Cisco Media   Convergence Appliance Software
System   Software Configuration (client)
XP and Vista
XP, Vista, and Win7
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No
CAD and Workforce   Management
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Operating   System
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Advance Thanks
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Dear sir,
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What is the perfect defference between AT NEW and ON CHANGE...

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