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https://issues.apache.org/jira/browse/HIVE-18598?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vineet Garg reassigned HIVE-18598:
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> Disallow constraints with EXTERNAL table
> ----------------------------------------
>
> Key: HIVE-18598
> URL: https://issues.apache.org/jira/browse/HIVE-18598
> Project: Hive
> Issue Type: Task
> Components: SQL
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Attachments: HIVE-18598.1.patch
>
>
> Since Hive do not manage the data for external tables and can not enforce
> constraints it doesn't make sense to allow constraints like PRIMARY KEY, NOT
> NULL etc for such tables.
> User can still specify RELY to signal optimizer for constraint related
> optimizations.
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