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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2812) Hive multi group by single reducer optimization fails when aggregation with no keys followed by query with no aggregations
Date Fri, 07 Dec 2012 11:59:21 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2812?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Namit Jain updated HIVE-2812:
-----------------------------

    Affects Version/s:     (was: 0.9.0)
               Status: Open  (was: Patch Available)

Can you refresh this ? It has been very long since it was visited.
                
> Hive multi group by single reducer optimization fails when aggregation with no keys followed
by query with no aggregations
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-2812
>                 URL: https://issues.apache.org/jira/browse/HIVE-2812
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Kevin Wilfong
>            Assignee: Kevin Wilfong
>         Attachments: ASF.LICENSE.NOT.GRANTED--HIVE-2812.D1821.1.patch
>
>
> In multi insert queries where one subquery involves an aggregation with no distinct or
group by keys and is followed by a query without any aggregations, like the following, Hive
will attempt to add a group by operator for the query without aggregations, causing semantic
analysis to fail.
> FROM src
> INSERT OVERWRITE TABLE table1 SELECT count(*)
> INSERT OVERWRITE TABLE table2 SELECT key;

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