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https://issues.apache.org/jira/browse/HIVE-18598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16356299#comment-16356299
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Ashutosh Chauhan commented on HIVE-18598:
-----------------------------------------
+1
> Disallow NOT NULL constraints to be ENABLED/ENFORCED 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, HIVE-18598.2.patch,
> HIVE-18598.3.patch
>
>
> HIVE-16605 is enabling/enforcing NOT NULL constraint. But since Hive do not
> manage the data for external tables and can not enforce constraints it
> doesn't make sense to allow NOT NULL constraints to be enabled/enforced on
> external table.
> User can still specify RELY to signal optimizer for constraint related
> optimizations.
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