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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 Wed, 27 Feb 2008 19:15:51 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12573031#action_12573031
] 

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

After applying 3330. A unique constraint won't be using a unique index 
but will use a  non unique backing  index with special case of 
uniqueWhenNotNull. So Case 3 needs to modified.
Thanks for pointing out.

There is one more minor change in CreateIndexConstantAction required (to 
fetch new attribute uniqueWhenNotNull) while creating a replacement index.
I will make these two changes in a separate patch.




> 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: derby-3456v1.diff, upgradetests.diff
>
>


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