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From "Serge Huber (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-2715) Improved join query performance
Date Sun, 05 Dec 2010 15:20:13 GMT

    [ https://issues.apache.org/jira/browse/JCR-2715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12966965#action_12966965

Serge Huber commented on JCR-2715:

Thanks Clemens for the JRat data.

>From looking at it seems that the sorting of the results is taking up the most time, so
I wonder how the sorting is done in the case of the SQL-1 implementation ?

Jukka, is there a reason why we load all the data in the SQL-2/QOM implementations at query
execution time ?

Best regards,

> Improved join query performance
> -------------------------------
>                 Key: JCR-2715
>                 URL: https://issues.apache.org/jira/browse/JCR-2715
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core, query
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>             Fix For: 2.2.0
>         Attachments: 2010-11-30_PM-04-55-23.zip, SQL2SearchTest.png, ThreeWayJoinTest.png,
> Our current implementation of SQL2 join queries does not perform very well on pretty
much any non-trivial data set.

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