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https://issues.apache.org/jira/browse/HIVE-29724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18105403#comment-18105403
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Zhihua Deng commented on HIVE-29724:
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In current master, adding partitions or renaming tables
[HIVE-28972|https://issues.apache.org/jira/browse/HIVE-28972] will force the
partitions reuse the current table's schema, so we shouldn't see the column
metadata bloat in a normal Metastore per my understanding.
I would prefer for adding this as an one-off command, executed post upgrade or
replication. After that, the code itself will handle the de-duplicating the
columns while adding new partitions.
> Provide a Metastore tool for de-duplicating the columns
> -------------------------------------------------------
>
> Key: HIVE-29724
> URL: https://issues.apache.org/jira/browse/HIVE-29724
> Project: Hive
> Issue Type: Improvement
> Reporter: Zhihua Deng
> Priority: Major
>
> Following the discussion on HIVE-29694, we can provide a tool to de-duplicate
> the columns to avoid column metadata bloat, which could happen during
> replication.
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