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Status Delivered
Workspace Db2 Utilities Suite for z/OS
Created by Guest
Created on Apr 14, 2020

RELATED IDEAS

Option to override LOAD utility maintaining MAXASSIGNEDVAL for identity columns in Db2 V12

Our existing process to move data from one region to another using the LOAD utility stopped working on tables with generated by default as identity key column after we upgraded to Db2 12. The new LOAD enhancement to maintain MAXASSIGNEDVAL is causing issues and we need an option to override or disable this new feature at the LOAD utility level.

Db2 12 introduced the LOAD utility to maintain MAXASSIGNEDVAL for user-provided input, and this new feature is enforced with LOAD REPLACE and LOAD RESUME YES. Prior to Db2 12, LOAD utility did not update MAXASSIGNEDVAL.

This is how it works now under Db2 V12:

If input file has identity column value higher than MAXASSIGNEDVAL in the Catalog, LOAD updates MAXASSIGNEDVAL with the higher value.

If input file has identity column value lower than MAXASSIGNEDVAL in the CATALOG, LOAD does not update MAXASSIGNEDVAL.

This design work fine with LOAD REPLACE as data gets replaced with the input file, but it does not always work with LOAD RESUME YES when input file gets added to the existing data.

With LOAD RESUME YES, MAXASSIGNEDVAL does not necessarily represent the maximum value. Table can potentially have identity key column value higher than the input file and MAXASSIGNEDVAL in the Catalog.

When LOAD utility updates MAXASSIGNEDVAL based on what's in the input file that shows higher than MAXASSIGNEDVA catalog but table actually has higher value than the input file , it will create -803 errors.

To mitigate this issue, we need an option to disable or override the new behavior with LOAD utility. Thank you.

Needed by Date Apr 30, 2020
  • Admin
    Janet Figone
    Reply
    |     Aug 14, 2020

    APAR PH28476 created.

  • Guest
    Reply
    |     Aug 3, 2020

    We upgraded to V12 last week & saw this 'new functionality' immediately.

    We are currently experiencing issues on a table with an identity key that has cycled. This table gets purged using an unload & load. The load utility is sloppily resetting the MAXASSIGNEDVAL to the highest value in the table (which is about 2.1 billion). The identity key then cycles the next morning as we see 10s of millions of inserts a day. We then hit a -803 shortly after the cycle occurs.

    Until we can script a fix - our only work around at this time is to manually alter the identity key DAILY after determining what the correct 'START WITH' value should be (what the MAXASSIGNEDVAL was before the load).

    This is extremely frustrating. Thanks V12.

  • Guest
    Reply
    |     Apr 16, 2020

    It would be of great benefit if this override is added. If it isn't added, I will be disappointed.

  • Guest
    Reply
    |     Apr 15, 2020

    we need this

  • Guest
    Reply
    |     Apr 14, 2020

    yes

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