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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HIVE-391) udafcount merge does not handle nulls
Date Tue, 07 Apr 2009 01:34:12 GMT

     [ https://issues.apache.org/jira/browse/HIVE-391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Namit Jain updated HIVE-391:
----------------------------

    Attachment: hive.391.2.patch

added more tests

> udafcount merge does not handle nulls
> -------------------------------------
>
>                 Key: HIVE-391
>                 URL: https://issues.apache.org/jira/browse/HIVE-391
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.3.0
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>            Priority: Blocker
>         Attachments: hive.391.1.patch, hive.391.2.patch
>
>
> udafcount merge does not handle nulls
> If the mapper does not emit any row on null input, i.e both count and count distinct
are present, and the aggregation function is count, 
> it will get a null pointer
> select count(1), count(distinct x.value) from src x where x.key = 9999;

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