How to use deltas.........

hi,please tell me how to use deltas concept in generic extraction.?
yhank you.

Generic extraction
https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/84bf4d68-0601-0010-13b5-b062adbb3e33
Refer:
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
http://help.sap.com/saphelp_nw04/helpdata/en/3f/548c9ec754ee4d90188a4f108e0121/content.htm
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/84bf4d68-0601-0010-13b5-b062adbb3e33
Generic Extraction via Function Module
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
For Creating Views,
You can also find the step by step procedure of this in chapter 11 in Fu Fu Book.
1. Create a view (Zname) in transaction SE11.
2. In the next popup window, select Database view.
3. Provide the short test and include the tables for the view.
4. Ideally, you should include all the key fields in the join conditions. Either you enter the joining conditions manually or, select all the tables on the left and click on the "Relationships". This will include all the joining conditions for the tables.
5. Select the fields that you want to view from the tables included.
6. In the selection conditions tab, include any conditions you want to put.
7. Activate the View.
Also refer:
How to create a view ?
View...
[DataBase View|http://help.sap.com/saphelp_nw04/helpdata/en/36/74c0358373003ee10000009b38f839/frameset.htm]
[Project View|http://help.sap.com/saphelp_nw04/helpdata/en/7e/c819eb52c511d182c50000e829fbfe/frameset.htm]
[Help Views|http://help.sap.com/saphelp_nw04/helpdata/en/cf/21ecd2446011d189700000e8322d00/frameset.htm]
Please go through these links for LO extraction and Delta modes.
/people/sap.user72/blog/2004/12/16/logistic-cockpit-delta-mechanism--episode-one-v3-update-the-145serializer146
/people/sap.user72/blog/2005/01/19/logistic-cockpit-delta-mechanism--episode-three-the-new-update-methods
/people/sap.user72/blog/2005/02/14/logistic-cockpit--when-you-need-more--first-option-enhance-it
/people/sap.user72/blog/2004/12/23/logistic-cockpit-delta-mechanism--episode-two-v3-update-when-some-problems-can-occur
/people/sap.user72/blog/2005/04/19/logistic-cockpit-a-new-deal-overshadowed-by-the-old-fashioned-lis
Direct delta:
transactional data or application posting will be directly available in the delta queue table with out any intermediate tables. then that data will be extracted from r/3 to bw.
Each document posting is directly transferred into the BW delta queue
u2022 each document posting with delta extraction leads to exactly one LUW in the respective BW delta queues
Transaction postings lead to:
1. Records in transaction tables and in update tables
2. A periodically scheduled job transfers these postings into the BW delta queue
3. This BW Delta queue is read when a delta load is executed.
Pros:
u2022 Extraction is independent of V2 update
u2022 Less monitoring overhead of update data or extraction queue
Cons:
u2022 Not suitable for environments with high number of document changes
u2022 Setup and delta initialization have to be executed successfully before document postings are resumed
u2022 V1 is more heavily burdened
Queued delta:
first the data posting will available in the extraction queue table. then there periodic job run take that data to queued delta table.
u2022 Extraction data is collected for the affected application in an extraction queue
u2022 Collective run as usual for transferring data into the BW delta queue
Transaction postings lead to:
1. Records in transaction tables and in extraction queue
2. A periodically scheduled job transfers these postings into the BW delta queue
3. This BW Delta queue is read when a delta load is executed.
Pros:
u2022 Extraction is independent of V2 update
u2022 Suitable for environments with high number of document changes
u2022 Writing to extraction queue is within V1-update: this ensures correct serialization
u2022 Downtime is reduced to running the setup
Cons:
u2022 V1 is more heavily burdened compared to V3
u2022 Administrative overhead of extraction queue
hope it is help you.......
Regards
Bala

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Message was edited by: Vishvesh

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