Whole delta update process

Question

Guys, it has been a great help from last 4-5 days for me. I never imagined it. Now the most important aspect is unclear to me. I have read a lot about delta update but it remains unclear to me.like
-R3 recompilation run
-setup table filling
-RSA7
-LBWE
-DELTA INITIALIZATION
-empty queue
please take time out and explain me the whole procedure via "queue delta update".
I have read a lot of links but still remain unclear. it will be big help.
kind regards
rajesh

Answer 1

Hi,
-setup table filling:
The Data in setup table is used in Delta initialization and full upload. Actually data comes from OLTP tables to Setup table in filling of setup table
http://www.sap-img.com/business/questions-answers-on-sap-bw.htm
-RSA7
The delta queue is a data store in the source system into which data records are automatically written using an update process in the source system (such as with FI documents) or using extraction using a function module after a data request from the BW (such as LIS extraction prior to BW 2.0).
With a delta request, the data records are transferred from the Scheduler into BW.
The data is stored in compressed form in the delta queue. It can be requested from several BW systems. The delta queue is also repeat enabled. In other words, the delta queue stores data from the last extraction process.  The repeat mode of the delta queue is specific to the target system.
With changes to the extract structure for a DataSource that took place between writing the data into the delta queue and reading of the queue data (for example with an upgrade), you can see from the data stored in the queue in which structure it was written to the delta queue. The queue monitor now contains fields that are now field that were not filled before and/or fields that were filled before but which are now unfilled.
You can use this function to check the delta queue.
-LBWE - for LO cokcpit customizing
https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/u/21406 [original link is broken] [original link is broken]
-DELTA INITIALIZATION
It is to set up for loading further delta's. Without init delta you cannot schedule an Extraction . If you have initialized a delta , You can get delta reocrds from the succesive run in the delta Queue
-empty queue - Tcode LBWQ
This is the T code(LBWQ) to check the Extraction q in LO. We know that there are 4 types of delta extraction that are available in LO. If you use “Queued Delta”update method then the data moves to Extraction queue(LBWQ). Then run Collective update to move the data from LBWQ into Delta Queue (RSA7). Then schedule the data using the infopackage by selecting Delta Load in the update tab.
Roberto's weblog:
/people/sap.user72/blog/2005/02/14/logistic-cockpit--when-you-need-more--first-option-enhance-it
/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
check this out...
LBWQ - T code is for what?
please take time out and explain me the whole procedure via "queue delta update".
Queued Delta:
In case of Queued delta LUW's are posted to Extractor Queue (LBWQ), by scheduling the V3 job we move the documents from Extractor queue to Delta Queue(i.e. RSA7) and we extract the LUW's from Delta Queue to BW side by running Delta Loads. Generally we prefer Queued Delta as it maintain the Extractor Log which us to handle the LUW's which are missed.
/people/sap.user72/blog/2005/01/19/logistic-cockpit-delta-mechanism--episode-three-the-new-update-methods
Hope it helps
Regards,
Malar B