Thomas Tauber-Marshall created HIVE-15075:
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Summary: Alter table change/replace unnecessarily drops stats
Key: HIVE-15075
URL: https://issues.apache.org/jira/browse/HIVE-15075
Project: Hive
Issue Type: Bug
Components: API
Affects Versions: 1.1.0
Reporter: Thomas Tauber-Marshall
The 'alter table' command with 'change' or 'replace' appears to
unconditionally drop the column stats for the columns that are affected. If the
new column has the same type as the old column, though, this is effectively
just a rename of the column and the stats shouldn't be affected.
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