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https://issues.apache.org/jira/browse/HIVE-28655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17922563#comment-17922563
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Hongdan Zhu commented on HIVE-28655:
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This PR is not very related to migrate the Hive metadata.
Normally we can use export/import command, or use schematool command, or use
Metastore Migration Scripts to migrate the Hive metadata.
Yes, we can skip to migrate the stats in migrating the table/partition metadata.
> Implement HMS Related Drop Stats Changes
> ----------------------------------------
>
> Key: HIVE-28655
> URL: https://issues.apache.org/jira/browse/HIVE-28655
> Project: Hive
> Issue Type: Task
> Reporter: Hongdan Zhu
> Assignee: Hongdan Zhu
> Priority: Major
> Labels: pull-request-available
>
> We need a way to drop the stats associated with the table/partition and its
> columns. This can help a lot in migration or replication where the stats data
> take huge time to copy. Particularly when the table is partitioned, we have
> stats rows for each table, partition, column combination, which can get huge
> when the number of partitions is huge.
> This is the HMS side changes.
> Part of the Apache Jira:
> https://issues.apache.org/jira/browse/HIVE-28170
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