[jira] Resolved: (DERBY-3456) Allow removing not null from collumns particpating in unique constraint.

["Myrna van Lunteren (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-3456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Myrna van Lunteren resolved DERBY-3456.
---------------------------------------

       Resolution: Fixed
    Fix Version/s: 10.4.1.3
         Assignee: Anurag Shekhar

Actually, looking at the current code, it appears to me that the issue of the message was resolved after all.
(there's a switch happening based on DataDictionary.DD_VERSION_DERBY_10_4 in ModifyColumnNode).

So, this can just be resolved.

I also noted that there *is* no release note for DERBY-3330 or its subtasks...Probably because DERBY-3330 was closed *after* release of 10.4 into which the functionality went, the check for existence of release note was not carried out. But there's no need for a release note on behalf of this subtask.

> 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
>            Assignee: Anurag Shekhar
>             Fix For: 10.4.1.3
>
>         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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