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From "Daniel John Debrunner (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2998) Add support for ROW_NUMBER() window function
Date Fri, 14 Dec 2007 16:05:43 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12551840
] 

Daniel John Debrunner commented on DERBY-2998:
----------------------------------------------

Looking at the spec I think ROW_NUMBER() OVER () is compliant.

Section 6.10 SR 6) covers ROW_NUMBER and rank function and there is explicit text (SR 6a)
that says:
       >>>> If RANK or DENSE_RANK is specified, then the window ordering clause
WOC of WDX shall be present.

I can't see any such restrictions for ROW_NUMBER in SR 6.

Also from googling I saw that IBM's RedBrick supports ROW_NUMBER() OVER ().

> 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, d2998-7.diff, d2998-7.stat, d2998-test.diff, d2998-test.stat, d2998-test2.diff,
d2998-test2.stat, d2998-test3.diff, d2998-test3.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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