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Date: Fri, 19 Jul 2013 17:02:49 +0000 (UTC)
From: "Yin Huai (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12658287.1374077588728.82230.1374253369249@arcas>
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Subject: [jira] [Updated] (HIVE-4877) In ExecReducer, remove tag from the
 row which will be passed to the first Operator at the Reduce-side
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     [ https://issues.apache.org/jira/browse/HIVE-4877?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yin Huai updated HIVE-4877:
---------------------------

    Status: Patch Available  (was: Open)
    
> In ExecReducer, remove tag from the row which will be passed to the first Operator at the Reduce-side
> -----------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-4877
>                 URL: https://issues.apache.org/jira/browse/HIVE-4877
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Yin Huai
>            Assignee: Yin Huai
>
> In ExecReducer, we can see ...
> {code}
> row.clear();
> row.add(keyObject);
> row.add(valueObject[tag.get()]);
> // The tag is not used any more, we should remove it.
> row.add(tag);
> {\code}
> I have seen this for a long time. Actually, we are using 
> {code}
> reducer.process(row, tag.get());
> {\code}
> to pass the tag. 
> If we do not need to add the tag to a row, we should remove it.

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