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https://issues.apache.org/jira/browse/HIVE-12304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14982945#comment-14982945
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Aihua Xu commented on HIVE-12304:
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Attach the patch to unregister functions and add a new unit test.
> "drop database cascade" needs to unregister functions
> -----------------------------------------------------
>
> Key: HIVE-12304
> URL: https://issues.apache.org/jira/browse/HIVE-12304
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 2.0.0
> Reporter: Aihua Xu
> Assignee: Aihua Xu
> Attachments: HIVE-12304.patch
>
>
> Currently "drop database cascade" command doesn't unregister the functions
> under the database. If the functions are not unregistered, in some cases like
> "describe db1.func1" will still show the info for the function; or if the
> same database is recreated, "drop if exists db1.func1" will throw an
> exception since the function is considered existing from the registry while
> it doesn't exist in metastore.
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