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From Anurag shekhar <Anurag.Shek...@Sun.COM>
Subject Re: [jira] Commented: (DERBY-3456) Allow removing not null from collumns particpating in unique constraint.
Date Fri, 07 Mar 2008 19:29:59 GMT
I will create a separate issue for it. Even though the amount
of code changes will be very small it will end breaking several
tests (relying on either state or message).

Mike Matrigali wrote:
> I have not looked at code so not sure how hard to determine which 
> error to throw, but seems like you should add a new error message for 
> the new code to use, and soft upgrade can continue to use
> the old message.  This is assuming there is no SQL standard for this
> exact error number.
> Anurag Shekhar (JIRA) wrote:
>>     [ 
>> 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:
>>>         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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