STEP BY STEP INFO ABOUT DELTAS

Question

hi,
this is  ahmed i want info about deltas with t. codes
thanks in advance
my mail id <removed>
regards
ahmed

Answer 1

Assuming you are talking about LO extraction:
Transaction postings lead to records in transaction tables
For an initial load a setup needs to be executed which reads the transaction data and stores the data in a setup table
These setup tables are read during an initial or full load
Further transactions are posted into the transaction tables and also caught into Update tables / Extraction Queue.
A periodically scheduled job transfers these postings into the BW delta queue(Data in the update tables is transferred
through a periodic update process to BW Delta queue)
This BW Delta queue is read when a delta load is executed.
First time initialize:
R/3 - Setup table (sbiw)
BW - Initial dataload (rsa1)
Schedule collective run (lbwe)
Re-initialize:
BW – Delete initialization record (InfoPackage: rsa1)
R/3 – Check delta queue (rsa7)
R/3 – Process outstanding updates (sa38/se38 - RMBWV3XX)
R/3 – Check delta queue (rsa7)
R/3 – Setup table (delete and fill: sbiw)
BW – Initial dataload (rsa1)
R/3 – Schedule collective run (lbwe)
Setup and Initial load
Run test-setup without blocking to get indication of setup runtime
Split setup of historic data with 1 “most current and change-able setup” as small as possible
Split initial loads using disjunct selections
Delta load selections will contain union of all init selections
Once setups are done, system is free to post (when using Queued delta and V3), postings are collected in Update Tables /
Extraction queue while initials can be started.
Only after all initials have been successful, start the periodic job to transfer data to BW Delta queue
Schedule the delta load