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https://issues.apache.org/jira/browse/DERBY-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12534838
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Thomas Nielsen commented on DERBY-2998:
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My problem at this stage is very basic - whenever the restriction is fulfilled,
stop the execution - but actually doing it in code is a little worse it seems.
I've been looking at the optimizer and generation of ProjectRestictNodes, but
got nowhere.
After an offline chat with Knut, I started looking at how a table scan is
stopped for indexes. Luckily it seems like IndexToBaseRowNode does something
similar to what I want to accomplish in it's generate() method.
> 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: row_number_prototype-2b.diff,
> row_number_prototype-2b.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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