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https://issues.apache.org/jira/browse/DERBY-3456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kathey Marsden reassigned DERBY-3456:
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Assignee: (was: Anurag Shekhar)
There has been no activity on this issue for over a year, so unassigning.
Anurag, please reassign yourself if you want to do further work on this issue.
It looks like there was a patch that was close to ready.
> Allow removing not null from collumns particpating in unique constraint.
> ------------------------------------------------------------------------
>
> Key: DERBY-3456
> URL: https://issues.apache.org/jira/browse/DERBY-3456
> Project: Derby
> Issue Type: Sub-task
> Components: SQL, Store
> Affects Versions: 10.4.1.3
> Environment: all
> Reporter: Anurag Shekhar
> Attachments: altertable.diff, derby-3456-Tests.diff,
> derby-3456-Tests_v2.diff, derby-3456v1.diff, derby-3456v2.diff,
> derby-3456v3.diff, derby-3456v4.diff, derby-3456v5.diff, setnulltest.diff,
> upgradetests.diff, upgradetests_v2.diff
>
>
> Enable alter table to change a column that participates in a unique
> constraint to allow nulls.
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