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From "Edward Capriolo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-4891) Distinct includes duplicate records
Date Fri, 19 Jul 2013 14:50:48 GMT

    [ https://issues.apache.org/jira/browse/HIVE-4891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13713722#comment-13713722
] 

Edward Capriolo commented on HIVE-4891:
---------------------------------------

I suspect there are some funny issues when partitions are not the same format, this is a newish
feature and we may not have as much coverage as we need.
                
> Distinct includes duplicate records
> -----------------------------------
>
>                 Key: HIVE-4891
>                 URL: https://issues.apache.org/jira/browse/HIVE-4891
>             Project: Hive
>          Issue Type: Bug
>          Components: File Formats, HiveServer2, Query Processor
>    Affects Versions: 0.10.0
>            Reporter: Fengdong Yu
>
> I have two partitions, one is sequence file, another is RCFile, but they are the same
data(only different file format).
> I have the following SQL:
> {code}
> select distinct uid from test where (dt ='20130718' or dt ='20130718_1') and cur_url
like '%cq.aa.com%';
> {code}
> dt ='20130718' is sequence file,(default input format, which specified when create table)
>  
> dt ='20130718_1' is RCFile.
> {code}
> ALTER TABLE test ADD IF NOT EXISTS PARTITION (dt='20130718_1') LOCATION '/user/test/test-data'
> ALTER TABLE test PARTITION(dt='20130718_1') SET FILEFORMAT RCFILE;
> {code}
> but there are duplicate recoreds in the result.
> If two partitions with the same input format, then there are no duplicate records.

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