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From "Anurag Shekhar (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-3456) Allow removing not null from collumns particpating in unique constraint.
Date Fri, 07 Mar 2008 18:09:46 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12576311#action_12576311
] 

Anurag Shekhar commented on DERBY-3456:
---------------------------------------

This error message is thrown while setting  a unique 
constraint column to null able in soft upgrade mode. 

In one of the two instances (soft upgrade or regular run) message 
will be wrong.  Changed  message will give a wrong info in soft upgrade
mode claiming that user was trying to modify a column from primary key
 when he is actually modifying  the constraint.

Is it ok to return wrong info in soft upgrade mode ? Probably we can 
mention it in release note that in case of soft upgrade mode a wrong
info will be thrown.

> 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: 10.4.0.0
>         Environment: all
>            Reporter: Anurag Shekhar
>            Assignee: 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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