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https://issues.apache.org/jira/browse/DERBY-3002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Pendleton updated DERBY-3002:
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Attachment: UpdateToTrunkSep2009.diff
Attached 'UpdateToTrunkSep2009.diff' patch does two things:
1) Updates the patch to the current trunk, and resolves some merge conflicts.
2) Restores the use of AggregateSortObserver for the common case of:
- GROUP BY
- no ROLLUP
- input data is NOT already in sorted order
- no DISTINCT aggregates.
However, I've got some test failures to investigate.
And, I still haven't investigated the review comments from Dag and Knut
And, I haven't yet re-run the performance tests to see if the performance is
improved
But here's the patch anyway, for safekeeping and to record where the work is
going.
> Add support for GROUP BY ROLLUP
> -------------------------------
>
> Key: DERBY-3002
> URL: https://issues.apache.org/jira/browse/DERBY-3002
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.4.1.3
> Reporter: Bryan Pendleton
> Assignee: Bryan Pendleton
> Priority: Minor
> Attachments: fixWhiteSpace.diff, IncludesASimpleTest.diff,
> passesRegressionTests.diff, prototypeChangeNoTests.diff,
> rewriteGroupByRS.diff, rollupNullability.diff, UpdateToTrunkSep2009.diff,
> useLookahead.diff
>
>
> Provide an implementation of the ROLLUP form of multi-dimensional grouping
> according to the SQL standard.
> See http://wiki.apache.org/db-derby/OLAPRollupLists for some more detailed
> information about this aspect of the SQL standard.
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