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Delta Queue - more questions from a newbie

Hello folks,

Can somebody explain me in more detail on Delta queue(RSA7) - specifically

1)How does the queue get filled up? When exactly does it get filled up?

2)Do BW always gets Delta records from Delta queue or from other sources such as Extractor? How does BW gets the delta records - is it pull or push?

3)How does Delta queue gets activated?

4)What are the prerequisites for Delta queue to send Delta records to BW?

5)Any Delta queue related transparent tables.

6)How many Delta queues are there? - one per datasource or just one Delta queue per source system.

7)Is there any more information you may feel relevant?

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2 Answers

  • Posted on Feb 21, 2005 at 07:44 PM

    Hi Jay,

    I think a very good way to start on this is to read the weblogs from Roberto. Here the links:

    Episode One:/people/sap.user72/blog/2004/12/16/logistic-cockpit-delta-mechanism--episode-one-v3-update-the-145serializer146

    Episode two:

    /people/sap.user72/blog/2004/12/23/logistic-cockpit-delta-mechanism--episode-two-v3-update-when-some-problems-can-occur

    Episode three:

    /people/sap.user72/blog/2005/01/19/logistic-cockpit-delta-mechanism--episode-three-the-new-update-methods

    Hope it helps,

    you can always ask more detailed questions afterwards.

    kr,

    Tom

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  • author's profile photo Former Member
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    Posted on Feb 21, 2005 at 11:40 PM

    Thanks for the attachment.

    Very helpful for Logistic but what about other Non Logistic cases?

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    • Former Member

      Hi Jay,

      For non logistics, you mean master data tables? e.g. 0MATERIAL, 0MAT_PLANT? these objects use different approach in DELTA extraction and they are much simplier.

      These objects get DELTA Updates from Change Pointer Objects, table <b>BDCPV, CDPOS, CDHDR</b>. If you activate them both in R/3 and BW, it creates a system generated <b>MESSAGE TYPE</b> in this table. Change Pointer in R/3 is not new. They have been there for quite some time. It is used for historical purposes to determine what was the previous value of certain R/3 fields and can be use for Audit, it can even be used to transfer IDOCS to other legacy systems dependent on R/3 for master data updates and it includes BW.

      The BW function modules installed by the BW Plugin in R/3 does the extraction process.

      Hope it helps; if it did, please grant points...

      Bye,

      --Jkyle

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