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Status Future consideration
Workspace Data Replication: Change Data Capture
Created by Guest
Created on Feb 23, 2023

RELATED IDEAS

Enhance CDC z/OS to support Db2 z/OS RBA/LRSN values in full length (New JCF: COMMITSEQ/INTENTSEQ)

See this idea on ideas.ibm.com

We plan to migrate existing SQL Replication CCD tables to CDC Live Audit tables.

For that we need to identify the exact values for the source RBA/LRSN log-points to keep the original sequence of DML and to identify the COMMIT scope of the transaction.

The currently provided Journal Control Fields (JCFs) &SEQNO and &CCID in CDC are cut. They only provide a 6-byte extract of the 10-byte RBA/LRSN. In a high-volume system, these values are not unique from a certain point in time.

In SQL Replication these values are represented in full 10-byte format in the columns IBMSNAP_INTENTSEQ and IBMSNAP_COMMITSEQ as VARCHAR(16) FOR BIT DATA.

We like to have the identical values and behavior in CDC JCFs as in SQL Replication.

COMMITSEQ should be the RBA/LRSN of the captured COMMIT of the source transaction, not the begin-of-UR as currently provided by &CCID.

We would like to have two new JCFs &INTENTSEQ and &COMMITSEQ with a datatype of VARCHAR(16) FOR BIT DATA that provide the full 10-byte RBA/LRSNs of each DML operation and COMMIT.

Needed By Yesterday (Let's go already!)
  • Guest
    Reply
    |     Dec 4, 2024

    We are also interested in this idea as we also want to do the same migration and at the moment the &SEQNO field does not map the entire RBA/LRSN.

    And this issue for us is blocking.


    Regards

  • Admin
    Alex Klufas
    Reply
    |     May 5, 2023

    IBM Update: thank you for submitting this request. We have reviewed it an deem it valid. We are working through architecting a solution. At this time, we will not be committing resources to this enhancement. Thanks.

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