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https://issues.apache.org/jira/browse/DERBY-6103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13631789#comment-13631789
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Kim Haase commented on DERBY-6103:
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Thanks, Dag.
I guess I am confused about how the syntax for the WINDOW clause can be
WINDOW window_name window_specification
when the example given does not use that form:
SELECT ROW_NUMBER() OVER R,
B,
SUM(A)
FROM T5 GROUP BY B WINDOW R AS ()
Is the example wrong?
> 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
> Affects Versions: 10.10.1.1
> Reporter: Dag H. Wanvik
> Assignee: Kim Haase
> Priority: Minor
> Attachments: DERBY-6103-2.diff, DERBY-6103-2.stat, DERBY-6103-2.zip,
> DERBY-6103.diff, DERBY-6103.stat, DERBY-6103.zip
>
>
> 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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