[jira] [Created] (HIVE-15742) Column stats should be preserved when it is renamed

[Chaoyu Tang (JIRA)]

Chaoyu Tang created HIVE-15742:
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             Summary: Column stats should be preserved when it is renamed
                 Key: HIVE-15742
                 URL: https://issues.apache.org/jira/browse/HIVE-15742
             Project: Hive
          Issue Type: Improvement
          Components: Statistics
            Reporter: Chaoyu Tang
            Assignee: Chaoyu Tang


Currently, when a column is renamed, its stats is delete. Recreating it could 
be expensive and we need preserve it if possible.



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