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Posted to dev@hive.apache.org by "Prasanth Jayachandran (JIRA)" <ji...@apache.org> on 2016/07/21 22:52:20 UTC

[jira] [Created] (HIVE-14310) ORC schema evolution should not completely disable PPD

Prasanth Jayachandran created HIVE-14310:
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             Summary: ORC schema evolution should not completely disable PPD
                 Key: HIVE-14310
                 URL: https://issues.apache.org/jira/browse/HIVE-14310
             Project: Hive
          Issue Type: Bug
    Affects Versions: 2.2.0
            Reporter: Prasanth Jayachandran
            Assignee: Prasanth Jayachandran
            Priority: Critical


Follow up for HIVE-14214 which completely shuts off PPD when there is any schema evolution. Some evolutions are safer for PPD like

byte -> short -> int -> long
float -> double
 conversions between char, varchar and strings

For all other conversions we can disable PPD for that specific column that has evolved by returning TruthValue.YES_NO



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