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https://issues.apache.org/jira/browse/DERBY-6103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13598847#comment-13598847
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Kim Haase commented on DERBY-6103:
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Would it be useful to add the following example to the topic in addition to the
other changes?
select row_number() over r, b, sum(a) from t5 group by b window r as ()
We don't currently list WINDOW as an SQL reserved word in
http://db.apache.org/derby/docs/10.9/ref/rrefkeywords29722.html. Should it be
added?
> Improve documentation of ROW_NUMBER function
> --------------------------------------------
>
> Key: DERBY-6103
> URL: https://issues.apache.org/jira/browse/DERBY-6103
> Project: Derby
> Issue Type: Improvement
> Components: Documentation
> Reporter: Dag H. Wanvik
> Assignee: Kim Haase
> Priority: Minor
>
> The current documentation doesn't mention that we allow the window definition
> to be explicit.
> The restriction on WHERE clause no longer applies, nor does the sentence
> about ORDER BY not being allowed in subqueries. Cf. rreffuncrownumber.dita.
> Also, the documentation mentions that we don't support LIMIT, but not that we
> now support the FETCH/OFFSET clause, which is often a better option than
> ROW_NUMBER.
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