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Posted to dev@hive.apache.org by "Harish Butani (JIRA)" <ji...@apache.org> on 2014/09/16 22:53:35 UTC

[jira] [Assigned] (HIVE-8145) CBO: bail from Optiq planning if a Select list contains multiple references to the same name

     [ 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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