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https://issues.apache.org/jira/browse/HIVE-2568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13151666#comment-13151666
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Ning Zhang commented on HIVE-2568:
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backported to 0.8.0
> HIVE-2246 upgrade script needs to drop foreign key in COLUMNS_OLD
> -----------------------------------------------------------------
>
> Key: HIVE-2568
> URL: https://issues.apache.org/jira/browse/HIVE-2568
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 0.8.0
> Reporter: Ning Zhang
> Assignee: Ning Zhang
> Priority: Blocker
> Fix For: 0.8.0, 0.9.0
>
> Attachments: D369.1.patch
>
>
> One more bug in the MySQL metastore upgrade script: the foreign key in
> COLUMNS needs to be dropped, otherwise drop_partition will fail because the
> SDS row cannot be deleted due to the foreign key constraint.
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