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https://issues.apache.org/jira/browse/HIVE-14310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15391601#comment-15391601
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Prasanth Jayachandran commented on HIVE-14310:
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Some test cases for this issue are failing because of HIVE-14324
> 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
> Attachments: HIVE-14310.WIP.patch
>
>
> 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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