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https://issues.apache.org/jira/browse/HIVE-23959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17170498#comment-17170498
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Yushi Hayasaka commented on HIVE-23959:
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Hello, I'm interested in dealing with the issue since we have difficulty with
it.
Just curious, how does it affect performance?
Also, it seems to replace calling `clearColumnStatsState` instead of
`updateOrGetPartitionColumnStats` for partitions. I think the performance
improvement is here.
Is it correct? Or does it have any other improvement too?
> Provide an option to wipe out column stats for partitioned tables in case of
> column removal
> -------------------------------------------------------------------------------------------
>
> Key: HIVE-23959
> URL: https://issues.apache.org/jira/browse/HIVE-23959
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> in case of column removal / replacement - an update for each partition is
> neccessary; which could take a while.
> goal here is to provide an option to switch to the bulk removal of column
> statistics instead of working hard to retain as much as possible from the old
> stats.
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