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Status Not under consideration
Workspace Db2 for z/OS
Created by Guest
Created on Jul 7, 2025

RELATED IDEAS

When executing an ALTER TABLE <table> ROTATE PARTITION please do NOT invalidate dependent packages

ALTER TABLE <table> ROTATE PARTITION is described as an ONLINE schema change. However in our 24/7 environment with tables being used frequently around the clock we cannot execute ALTER TABLE <table> ROTATE PARTITION on our most heavily used tables because this statement needs to do a break-in on all dependent packages to mark them as invalid so they can be auto rebind'ed. To avoid this problem we need to stop all the transactions systems using such a table and this causes downtime for our customers.

We would like some kind of feature for ALTER TABLE <table> ROTATE PARTITION to circumvent this problem. In our case we have a fixed number of partitions so a mechanism like what is used for ONLINE REORG to switch from one VSAM dataset to another should be possible to reuse or get ideas from. 

Needed By Yesterday (Let's go already!)
  • Admin
    Sueli Almeida
    May 7, 2026

    Dear Claus,

    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 does not align within functionality prioritized for delivery within the next 12 months. Therefore, unfortunately, we will not be considering this idea at this time.  We do plan to revisit this idea in the near future. Due to it complexity we cannot make it sooner. Just a bit of background information for you: the ALTER TABLE ROTATE PARTITION needs to serialize against the dependent packages because rotate deletes physical part data. This serialization is the package lock at X state, regardless of whether the package is invalidated or not. The X package lock is obtained on ALTER ROTATE PARTITION is to quiesce static SQL statements potentially accessing that partition where data needs to be deleted. We don't know whether an SQL statement can access the rotating partition or not at static bind time to record partition-level dependency (INSERT with subselect, for example).

    We appreciate your input to the Db2 for z/OS development team. We hope that you will continue to submit enhancement suggestions 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

    Reply
  • Guest
    Jan 29, 2026

    And it should not even invalidate the statement when you use statement level dependencies for packages

    Reply

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