[jira] Updated: (HIVE-1792) track the joins which are being converted to map-join automatically

["Liyin Tang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-1792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Liyin Tang updated HIVE-1792:
-----------------------------

    Attachment: hive-1792-1.patch

Add a new hook: MapJoinCounterHook, which will measure how many joins converted into common joins and how many map join revert back to common join.

And this new post hook implements the new hook interface with HookContext

Please review.

> track the joins which are being converted to map-join automatically
> -------------------------------------------------------------------
>
>                 Key: HIVE-1792
>                 URL: https://issues.apache.org/jira/browse/HIVE-1792
>             Project: Hive
>          Issue Type: New Feature
>          Components: Query Processor
>    Affects Versions: 0.7.0
>            Reporter: Liyin Tang
>            Assignee: Liyin Tang
>             Fix For: 0.7.0
>
>         Attachments: hive-1792-1.patch
>
>
> We should be able to track how many queries (join) got converted to
> map-join

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