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https://issues.apache.org/jira/browse/HIVE-8145?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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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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