IBM Data and AI Ideas Portal for Customers


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Status Not under consideration
Workspace Replication: Q-Replication & Availability
Components Replication for Availability (LUW, Db2 Warehouse)
Created by Guest
Created on Sep 15, 2023

RELATED IDEAS

Q Capture/Db2 LUW: Replicate DROP COLUMN-operations

If the source table of an active subscription is altered by a DROP COLUMN operation, there is high risk of continuous data corruption on that table due to incorrect reading of Db2's transaction log entries from that time on.

The current workaround is deactivating the subscription previous to the DROP COLUMN, manually adjusting the target table, and then restarting the subscription. This of course implies downtime on the target side, manual work, and reloading the table.

Q Capture should be able to handle that operation just like it does with ADD COLUMN: In IBMQREP_SUBS there should be a column REPL_DROPCOL that works like REPL_ADDCOL. The benefits are clear: First, this table alteration (the dropping of the column) would be transparently replicated to the target. And second, all future transactions on the table would be correctly read from the transaction log since Q Capture took note of the new table structure

Needed By Yesterday (Let's go already!)

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