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From "Gunther Hagleitner (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-8179) Fetch task conversion: Remove some dependencies on AST
Date Fri, 19 Sep 2014 08:36:34 GMT

     [ https://issues.apache.org/jira/browse/HIVE-8179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gunther Hagleitner updated HIVE-8179:
-------------------------------------
    Status: Patch Available  (was: Open)

> Fetch task conversion: Remove some dependencies on AST
> ------------------------------------------------------
>
>                 Key: HIVE-8179
>                 URL: https://issues.apache.org/jira/browse/HIVE-8179
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gunther Hagleitner
>            Assignee: Gunther Hagleitner
>         Attachments: HIVE-8179.1.patch, HIVE-8179.2.patch
>
>
> fetch task conversion is does some strange things:
> For instance: select * from (select * from x) t, wont get converted even though it's
the exact same operator plan as: select * from x.
> Or: select * from foo will get converted with minimal, but select <list all columns
of foo> from foo won't.
> We also check the AST for group by etc, but then do the same thing in the operator tree
again.
> I'm also wondering why we ship with "moar" as default, but test with "minimal" in the
unit tests.



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