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From "Yin Huai (JIRA)" <>
Subject [jira] [Resolved] (HIVE-3670) Optimize queries involving self join
Date Thu, 18 Jul 2013 00:32:51 GMT


Yin Huai resolved HIVE-3670.

    Resolution: Not A Problem

Based on the code of setChildren in MapOperator, if multiple TableScanOperators are associated
to the same path, those TableScanOperators will all be added into the children list of MapOperator.
We can take advantage of it by adding optimizations (in separate jiras) which can make sure
those operation paths using the same inputs can be executed in the same MR job. I will close
this jira as "Not A Problem".
> Optimize queries involving self join
> ------------------------------------
>                 Key: HIVE-3670
>                 URL:
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor
>            Reporter: Yin Huai
>            Assignee: Yin Huai

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