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From "James Taylor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (PHOENIX-16) Join Query optimization
Date Fri, 31 Jan 2014 02:42:08 GMT

    [ https://issues.apache.org/jira/browse/PHOENIX-16?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13887399#comment-13887399
] 

James Taylor commented on PHOENIX-16:
-------------------------------------

If that's the case, then that's a bug. As a workaround, try putting you other expressions
in the ON clause like this:

select * from t1 inner join t2 on t1.col1 = t2.col2 and t1.id < 1000 and t2.id < 1000



> Join Query optimization
> -----------------------
>
>                 Key: PHOENIX-16
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-16
>             Project: Phoenix
>          Issue Type: Improvement
>    Affects Versions: 3.0.0
>            Reporter: abhishek
>
> select * from t1 inner join t2 on t1.col1 = t2.col2 where t1.id < 1000 and t2.id <
1000
> For above query, phoenix first join the tables t1 and t2, and then apply the filter t1.id
< 1000 and t2.id < 1000. This is very inefficient. This can be easily fixed by pushing
the filter operation before the join query.



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