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Date: Tue, 16 Sep 2014 20:53:35 +0000 (UTC)
From: "Harish Butani (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12741935.1410900783000.48676.1410900815301@Atlassian.JIRA>
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References: <JIRA.12741935.1410900783000@Atlassian.JIRA>
 <JIRA.12741935.1410900783286@arcas>
Subject: [jira] [Assigned] (HIVE-8145) CBO: bail from Optiq planning if a
 Select list contains multiple references to the same name
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     [ https://issues.apache.org/jira/browse/HIVE-8145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Harish Butani reassigned HIVE-8145:
-----------------------------------

    Assignee: Harish Butani

> CBO: bail from Optiq planning if a Select list contains multiple references to the same name
> --------------------------------------------------------------------------------------------
>
>                 Key: HIVE-8145
>                 URL: https://issues.apache.org/jira/browse/HIVE-8145
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>
> Optiq explicitly disallows this:
> {code}
> select x, x from t1
> {code}
> This is allowed in Hive (and also in mysql). Will check in Postgres. For now bailing from Optiq planning if we see this. Will file an Optiq issue. 


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