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Status Not under consideration
Workspace Db2 for z/OS
Created by Guest
Created on Mar 5, 2019

Enhance ALTER INDEX that columns can be reordered without drop and recreate

Recently we had a major incidence in production because an automatic bind happened after the drop of an index of a very big table and before the recreate of that index, although the Create used the Option DEFER YES. We wanted to reorder some columns in that index which is currently impossible without a drop of that index. So we want an enhancement here so that we can alter the index as a pending Change and then rebuild it. 

  • Admin
    Janet Figone
    Reply
    |
    May 13, 2019

    Thank you for submitting this Db2 for z/OS enhancement request.

    We have reviewed this request and believe it is a good candidate for the Db2 for z/OS product. However, it is not in our current roadmap and we are unable to deliver it within the next 24 months. Therefore, unfortunately, we will not be implementing this Idea.

    We appreciate your input to the Db2 for z/OS development team.  We also hope that you will continue to submit ideas for improvements as customer feedback is a key component

    to shaping the future direction of Db2 for z/OS. 

    Sincerely,

    Db2 for z/OS Team

  • Guest
    Reply
    |
    Apr 15, 2019

    Hi

    We want to follow our naming conventions, which we can't, because at least index space Name and index Name will differ. It is much more work to do, because first you have to create this index in all our test-Systems. If the index is then created in production you can delete the old index in all Subsystems and finally rename them all. It would be much easier, if we can alter the index to get the columns in the desired order.

     

    regards
    W. Janißen 

  • Admin
    Janet Figone
    Reply
    |
    Apr 12, 2019

    We would have expected that you would do the following, with an optional RENAME INDEX as step 4:

    1 - CREATE new INDEX DEFER YES
    2 - REBUILD new INDEX
    3 - DROP old INDEX

  • Admin
    Janet Figone
    Reply
    |
    Apr 12, 2019

    Thank you for this Idea. For us to consider this, we would like to ask that you please provide a use case.