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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3002) Add support for GROUP BY ROLLUP
Date Thu, 01 Oct 2009 03:51:23 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3002?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bryan Pendleton updated DERBY-3002:
-----------------------------------

    Attachment: setCurrentRow.diff

Attached patch calls setCurrentRow when returning a rolled-up grouped 
result from the finishedResults lookaside buffer.

This patch is growing a bit long in the tooth. I'm considering the following plan:
 - moving the current patch toward commit
 - filing followup issues for the remaining problems, namely:
   - documentation is needed
   - need to investigate the handling of the other varieties of ROLLUP which
     are described by the SQL standard but not covered by this patch
   - need to address the nullability-in-subqueries problem uncovered by Dag

Does this seem like a reasonable approach?

> 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, setCurrentRow.diff,
UpdateToTrunkSep2009.diff, useAggregateObserver.diff, useLookahead.diff, withDagsCastTest.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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