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Status Future consideration
Workspace Optim
Components Optim Archive
Created by Guest
Created on Feb 1, 2019

Allow Multi-Key Deletes from Parent Tables

Optim Data Growth currently has a restriction in place to disallow using a multi-key delete strategy on a Parent table. If you attempt to delete more than one key at a time, Optim will issue a severe warning code and then default the key limit to 1 single key.

Delete Process Warnings:

  "Table XYZ.dbo.MasterEventLog cannot support multiple key deletion. The table is a parent of a relational integrity constraint."

I'm not sure why Optim says it can't delete multiple keys at once from a parent table as that certainly is not a SQL Server (or other DBMS) restriction and seems like it's maybe some very old DBMS limitation.

Deleting a single key value at a time is a serious hindrance on performance and shouldn't even be an issue anyway since Optim deletes children before parents -AND- every DBMS engine has logic to ensure you won't orphan a child row. They don't care if your WHERE clause for a parent table Delete has one key or 100 keys; it will still verify zero child rows exist.

I opened a PMR for this performance issue and was told it has to be a RFE for whatever reason. The original PMR was 36324,082,000 if you need that for a reference. This would be a big win for performance improvement (something Optim needs on Deletes anyway) and it shouldn't be a big effort since this seems like an old edit left in place for whatever reason.