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From "Kevin Wilfong (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-2812) Hive multi group by single reducer optimization fails when aggregation with no keys followed by query with no aggregations
Date Sat, 18 Feb 2012 01:07:59 GMT
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
    Affects Versions: 0.9.0
            Reporter: Kevin Wilfong
            Assignee: Kevin Wilfong


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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