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Date: Fri, 9 Jul 2010 13:46:57 -0400 (EDT)
From: "Zheng Shao (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Commented: (HIVE-287) count distinct on multiple columns
 does not work
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    [ https://issues.apache.org/jira/browse/HIVE-287?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12886794#action_12886794 ] 

Zheng Shao commented on HIVE-287:
---------------------------------

The plan looks good to me.

Just one comment: I think we should change the comment/class name for GenericUDAFResolver2.  Let's explicitly say GenericUDAFResolver2 is for UDAFs that want to have control over whether DISTINCT or * should be treated differently. For normal UDAFs, they should still inherite from GenericUDAFResolver.

Does that sound OK?


> count distinct on multiple columns does not work
> ------------------------------------------------
>
>                 Key: HIVE-287
>                 URL: https://issues.apache.org/jira/browse/HIVE-287
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Arvind Prabhakar
>         Attachments: HIVE-287-1.patch, HIVE-287-2.patch, HIVE-287-3.patch, HIVE-287-4.patch, HIVE-287-5-branch-0.6.patch, HIVE-287-5-trunk.patch
>
>
> The following query does not work:
> select count(distinct col1, col2) from Tbl

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