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From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-11459) LEFT SEMI JOIN with SELECT * should not include right-side non-key columns
Date Mon, 10 Aug 2015 02:49:45 GMT

     [ https://issues.apache.org/jira/browse/HIVE-11459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matt McCline reassigned HIVE-11459:
-----------------------------------

    Assignee: Matt McCline

> LEFT SEMI JOIN with SELECT * should not include right-side non-key columns
> --------------------------------------------------------------------------
>
>                 Key: HIVE-11459
>                 URL: https://issues.apache.org/jira/browse/HIVE-11459
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>
> {code}
> select * from tmp2 left semi join tmp1 where c1 = id and c0 = q
> tmp2.id	tmp2.d	tmp2.q	tmp1.c0	tmp1.d	tmp1.c1
> 1	^	20134	20134	^	1
> 3	^	20134	20134	^	3
> 1	^	20135	20135	^	1
> 1	^	20138	20138	^	1
> 2	^	20139	20139	^	2
> {code}
> tmp1 column "d" is a non-key and should not be included.
> The LEFT SEMI JOIN clause is something Hive added.  We ought to define the semantics
here
> Also see https://issues.apache.org/jira/browse/HIVE-11431.



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