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Posted to derby-dev@db.apache.org by "Witold Szczerba (JIRA)" <ji...@apache.org> on 2010/03/24 21:13:27 UTC
[jira] Updated: (DERBY-4595) Inferior query plan chosen for outer
join
[ https://issues.apache.org/jira/browse/DERBY-4595?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Witold Szczerba updated DERBY-4595:
-----------------------------------
Attachment: queryplan-2b.txt
queryplan-2.txt
Query plans for second query.
> Inferior query plan chosen for outer join
> -----------------------------------------
>
> Key: DERBY-4595
> URL: https://issues.apache.org/jira/browse/DERBY-4595
> Project: Derby
> Issue Type: Bug
> Affects Versions: 10.5.3.0
> Environment: Ubuntu 9.10, Sun Java 6 update 18
> Reporter: Witold Szczerba
> Priority: Blocker
> Attachments: netbroker-ddl.txt, queryplan-1.txt, queryplan-1b.txt, queryplan-2.txt, queryplan-2b.txt
>
>
> I was describing everything here and when trying to submit - everything was lost, because the session ended and there was no way of going back, so I will just point to derby-user mailing list, everything is there, just follow the thread:
> http://mail-archives.apache.org/mod_mbox/db-derby-user/201003.mbox/%3Ce0a08d801003190619l3d3181pa55ca79145b7810d@mail.gmail.com%3E
> or there:
> http://thread.gmane.org/gmane.comp.apache.db.derby.user/12394
> The bottom line is - I had to change application to avoid the query, it is so slow (around one hour on production) and there is no workaround.
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