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https://issues.apache.org/jira/browse/DERBY-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12525117
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Knut Anders Hatlen commented on DERBY-2998:
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Hi Thomas,
It would probably be easier for people to tell what's wrong and give advice if
you posted a patch which shows what you have tried so far. I would guess the
VerifyError is thrown because you're passing the wrong argument type. I think
the error message would look different if you were missing a class.
By the way, don't aggregators normally return one value for all rows within a
group? Does that match what you're trying to achieve with row numbers?
> 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
>
> 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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