[jira] [Assigned] (HIVE-8159) CBO: bail from Optiq planning if a Select list contains multiple references to the same name

["Ashutosh Chauhan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-8159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashutosh Chauhan reassigned HIVE-8159:
--------------------------------------

    Assignee: Ashutosh Chauhan  (was: Harish Butani)

> CBO: bail from Optiq planning if a Select list contains multiple references to the same name
> --------------------------------------------------------------------------------------------
>
>                 Key: HIVE-8159
>                 URL: https://issues.apache.org/jira/browse/HIVE-8159
>             Project: Hive
>          Issue Type: Sub-task
>          Components: CBO
>            Reporter: Harish Butani
>            Assignee: Ashutosh Chauhan
>             Fix For: 0.14.0
>
>
> 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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