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https://issues.apache.org/jira/browse/DERBY-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12550401
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Thomas Nielsen commented on DERBY-2998:
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An email discussion with A B on derby-dev indicates that the conditional
pushing I originally did in PredicateList was correct after all :)
So I need to sort out how I can get the failing join Knut reported to work, and
also why the less than works, but greater than doesn't.
I started looking at triggerig materializing the OLAPResultSet by returning
true from OLAPNode.performMaterialization() as one option.
I might need to move the generation of calls to increment code from
ResultColumnList.generateCore() and down into
RowNumberColumnNode.generateCore(). I'm also wondering wether the call
shouldn't be made into BaseActivation like in d2998-6.diff.
I'll keep digging...
> 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,
> d2998-6.diff, d2998-6.stat, d2998-test.diff, d2998-test.stat,
> d2998-test2.diff, d2998-test2.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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