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From "Yin Huai (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HIVE-3511) Constant values in aggregation parameters should not be attached to every map output row
Date Fri, 28 Sep 2012 00:49:07 GMT

     [ https://issues.apache.org/jira/browse/HIVE-3511?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yin Huai resolved HIVE-3511.
----------------------------

    Resolution: Duplicate

Duplicates with HIVE-757. Close it
                
> Constant values in aggregation parameters should not be attached to every map output
row
> ----------------------------------------------------------------------------------------
>
>                 Key: HIVE-3511
>                 URL: https://issues.apache.org/jira/browse/HIVE-3511
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Yin Huai
>            Priority: Minor
>
> When map-side-aggregation is disabled (hive.map.aggr=false), constant values in aggregation
parameters are attached to every map output row. For example, in test case 'count.q' (https://github.com/apache/hive/blob/trunk/ql/src/test/results/clientpositive/count.q.out).
For count(1), if hive.map.aggr=false, '1' will be attached to every output row of ReduceSinkOperator.

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