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Status Submitted
Workspace Db2 Utilities Suite for z/OS
Created by Guest
Created on Oct 28, 2024

RELATED IDEAS

Reorg Index materialization

For REORG INDEX pending alter materialization, the utility performs a DRAIN ALL on the target index before starting the SWITCH phase, and then relies on DDL/Dependency logic to invalidate all the affected plans/packages/DSC...etc in the middle of SWITCH phase. If any of these lock requests fail, the REORG would fail/abend in the middle of SWITCH phase and rely on the next user action to either restart or to term utility.

For REORG TABLESPACE pending alter materialization, the utility tries to 'quiesce' the required plans/packages and other resources in the final LOG iteration before it drains all and enters the SWITCH phase to complete the REORG.

The REORG TABLESPACE approach is a bit more user friendly as the utility treats any -904 encountered by the REORG as a ‘drain error’, releases the resources and repeats the processing at a later time without spending much time setting the objects to UTUT dbet state. REORG INDEX had a different design than REORG TABLESPACE because REORG INDEX has never serialised to any table/table space constructs/locks in the past other than the index's drain lock.

The REORG INDEX should really be improved to serialize much like a REORG TABLESPACE when materializing a pending definition change on the index, to avoid 04E abends and timeouts.

Needed By Yesterday (Let's go already!)

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