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https://issues.apache.org/jira/browse/DERBY-3002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12696066#action_12696066
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Knut Anders Hatlen commented on DERBY-3002:
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This issue has had what looks like a fairly complete patch for quite some time.
Should we try to get it committed?
I haven't studied the details of the patch, but the general approach looks fine
to me. I think this is a very useful feature even if the performance is
suboptimal.
My only comments after reading the patch, are
1) If I read http://wiki.apache.org/db-derby/OLAPRollupLists correctly, the set
of expected rows returned by the test case lacks one row: {null,null,null,"12"}
2) The patch appears to have been created with a text editor whose tab size is
8, so the new space-indented lines are too far to the right
> Add support for GROUP BY ROLLUP
> -------------------------------
>
> Key: DERBY-3002
> URL: https://issues.apache.org/jira/browse/DERBY-3002
> Project: Derby
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 10.4.1.3
> Reporter: Bryan Pendleton
> Assignee: Bryan Pendleton
> Priority: Minor
> Attachments: IncludesASimpleTest.diff, prototypeChangeNoTests.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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