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https://issues.apache.org/jira/browse/DERBY-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12548363
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Knut Anders Hatlen commented on DERBY-2998:
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It would also be good to document why the lock timeouts need to be lowered. 
It's not obvious to me, as a single connection shouldn't cause any lock 
conflicts.

> Add support for ROW_NUMBER() window function
> --------------------------------------------
>
>                 Key: DERBY-2998
>                 URL: https://issues.apache.org/jira/browse/DERBY-2998
>             Project: Derby
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Thomas Nielsen
>            Assignee: Thomas Nielsen
>            Priority: Minor
>         Attachments: d2998-4.diff, d2998-4.stat, d2998-5.diff, d2998-5.stat, 
> d2998-test.diff, d2998-test.stat
>
>
> As part of implementing the overall OLAP Operations features of SQL 
> (DERBY-581), implement the ROW_NUMBER() window function.
> More information about this feature is available at 
> http://wiki.apache.org/db-derby/OLAPRowNumber

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