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https://issues.apache.org/jira/browse/DERBY-2998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Nielsen updated DERBY-2998:
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Attachment: d2998-10.stat
d2998-10.diff
No, you didn't miss the writeup Army. The wikipage is all there is, and I
haven't kept it up to date :/ Mostly because I've been feeling my way forward
with this while trying to understand the inner workings of Derby. I'll try to
make up for it now and do a proper writeup for the proposed changes.
Attached is an updated patch d2998-10.diff.
Still have some ordering issues, but where clauses and multiple row_number()
columns are evaluated properly:
ij>
select * from t;
A |B
-----------------------
10 |100
20 |200
30 |300
40 |400
50 |500
5 rows selected
ij>
select row_number() over (), tr.* from (select row_number() over () as r, t.*
from t) as tr where r > 2;
row_number() |R |A |B
-----------------------------------------------------------------
1 |3 |30 |300
2 |4 |40 |400
3 |5 |50 |500
3 rows selected
ij>
> 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, d2998-4.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
>
>
> 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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