Skip to Main Content
IBM Data Platform Ideas Portal for Customers


This portal is to open public enhancement requests against products and services offered by the IBM Data Platform organization. To view all of your ideas submitted to IBM, create and manage groups of Ideas, or create an idea explicitly set to be either visible by all (public) or visible only to you and IBM (private), use the IBM Unified Ideas Portal (https://ideas.ibm.com).


Shape the future of IBM!

We invite you to shape the future of IBM, including product roadmaps, by submitting ideas that matter to you the most. Here's how it works:


Search existing ideas

Start by searching and reviewing ideas and requests to enhance a product or service. Take a look at ideas others have posted, and add a comment, vote, or subscribe to updates on them if they matter to you. If you can't find what you are looking for,


Post your ideas

Post ideas and requests to enhance a product or service. Take a look at ideas others have posted and upvote them if they matter to you,

  1. Post an idea

  2. Upvote ideas that matter most to you

  3. Get feedback from the IBM team to refine your idea


Specific links you will want to bookmark for future use

Welcome to the IBM Ideas Portal (https://www.ibm.com/ideas) - Use this site to find out additional information and details about the IBM Ideas process and statuses.

IBM Unified Ideas Portal (https://ideas.ibm.com) - Use this site to view all of your ideas, create new ideas for any IBM product, or search for ideas across all of IBM.

ideasibm@us.ibm.com - Use this email to suggest enhancements to the Ideas process or request help from IBM for submitting your Ideas.

IBM Employees should enter Ideas at https://ideas.ibm.com



Status Submitted
Workspace Db2 for z/OS
Created by Guest
Created on Aug 30, 2026

Make ALTER TABLESPACE and INDEX to new stogroup (and VCAT) controlled by DB2

Changing VCAT fror db2 tableapsces and indexes is is not well supported by DB2. The current process can lead to failures.

Example for a INDEX

-STOP indexspace
ALTER indexspaceUSING STOGROUP stogroup-name
-START indexspace

REBUILD INDEX indexname

If the VCAT for the object is different to the original VCAT we are left with an orphan vsam dataset with the original VCAT

Similarly,TABLESPACE changes are more difficult to change the VCAT

-STOP OBJECT
DFDSS COPY and RENAMEUNC
-START object

The process is outside of DB2 control 

Needed By Yesterday (Let's go already!)
  • Guest
    Aug 31, 2026

    That is a wonderful idea, having it under DB2 control can certainly reduce need to manually intervene with the stopping and starting an object space is preferable to me. 

    For example, putting the object in 'Advisory pending' mode after the Alter Using Stogroup still allows read and write activity, an Online Reorg can be run to complete Advisory warning. This negates the need to stop and start an object as this could be an online activity.

  • Guest
    Aug 31, 2026

    I have been converting range partitioned tables to use PAGENUM RELATIVE (note PAGENUM ABSOLUTE is deprecated)

    https://www.ibm.com/docs/en/db2-for-zos/13.0.0?topic=allocation-pbr-table-spaces-relative-page-numbering

    Db2 forces us to use a stogroup with the EXTENDED Storage attribute when we apply PAGENUM RELATIVE.

    That gives us a choice to either ALTER the objects to use a new Stogroup with Extended storage or ALTER the existing Stogroup to have extended storage and potentially reorg all objects that use the stogroup, so we don't end up with a mixture of extended storage and not.