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https://issues.apache.org/jira/browse/DERBY-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12574006#action_12574006
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A B commented on DERBY-2998:
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Committed d2998-19.diff and d9998-test9.diff both with svn # 632494:
URL: http://svn.apache.org/viewvc?rev=632494&view=rev
In addition to the follow-up work mentioned in my previous comment, I also
noticed one more thing that requires investigation. The following query fails
with an ArrayIndexOutOfBounds exception while trying to print the query plan
(i.e. after the query is executed, and only if "logQueryPlan" is set to true):
select count(*) from
(select i, row_number() over () from t1
union all
select distinct row_number() over(), row_number() over() from t1) x(a, b);
If I remove the "DISTINCT" or else replace one of the row_number() columns in
the SELECT DISTINCT query with a simple column reference, the query plan is
generated correctly. Pretty minor in the grand scheme of things, but I thought
I'd mention it.
Thanks for all of your work on this, Thomas!
> 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: d2998-10.diff, d2998-10.stat, d2998-11.diff,
> d2998-12.diff, d2998-12.stat, d2998-13.diff, d2998-13.stat, d2998-14.diff,
> d2998-14.stat, d2998-15.diff, d2998-15.stat, d2998-16.diff, d2998-16.stat,
> d2998-17.diff, d2998-17.stat, d2998-18.diff, d2998-18.stat, d2998-19.diff,
> d2998-19.stat, d2998-4.diff, d2998-4.stat, d2998-5.diff, d2998-5.stat,
> d2998-6.diff, d2998-6.stat, d2998-7.diff, d2998-7.stat, d2998-8.diff,
> d2998-8.stat, d2998-9-derby.log, d2998-9.diff, d2998-9.stat,
> d2998-doc-1.diff, d2998-doc-1.stat, d2998-test.diff, d2998-test.stat,
> d2998-test2.diff, d2998-test2.stat, d2998-test3.diff, d2998-test3.stat,
> d2998-test4.diff, d2998-test4.stat, d2998-test6.diff, d2998-test7.diff,
> d2998-test8.diff, d2998-test9.diff
>
>
> 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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