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From "Jesus Camacho Rodriguez (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12017) Do not disable CBO by default when number of joins in a query is equal or less than 1
Date Mon, 16 Nov 2015 18:17:11 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15007037#comment-15007037
] 

Jesus Camacho Rodriguez commented on HIVE-12017:
------------------------------------------------

[~ashutoshc], I was waiting for a QA run.

I updated the patch with the latest q files updates, and the RB entry with the code changes
as well. Thanks

> Do not disable CBO by default when number of joins in a query is equal or less than 1
> -------------------------------------------------------------------------------------
>
>                 Key: HIVE-12017
>                 URL: https://issues.apache.org/jira/browse/HIVE-12017
>             Project: Hive
>          Issue Type: Improvement
>          Components: CBO
>    Affects Versions: 2.0.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>         Attachments: HIVE-12017.01.patch, HIVE-12017.02.patch, HIVE-12017.03.patch, HIVE-12017.04.patch,
HIVE-12017.05.patch, HIVE-12017.06.patch, HIVE-12017.07.patch, HIVE-12017.08.patch, HIVE-12017.09.patch,
HIVE-12017.10.patch
>
>
> Instead, we could disable some parts of CBO that are not relevant if the query contains
1 or 0 joins. Implementation should be able to define easily other query patterns for which
we might disable some parts of CBO (in case we want to do it in the future).



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