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Posted to dev@hive.apache.org by "Thomas Tauber-Marshall (JIRA)" <ji...@apache.org> on 2016/10/26 20:01:01 UTC

[jira] [Created] (HIVE-15075) Alter table change/replace unnecessarily drops stats

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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