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Posted to dev@hive.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2013/03/28 16:47:16 UTC

[jira] [Resolved] (HIVE-4121) ORC should have optional dictionaries for both strings and numeric types

     [ https://issues.apache.org/jira/browse/HIVE-4121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Owen O'Malley resolved HIVE-4121.
---------------------------------

    Resolution: Duplicate

I forgot I had filed this and filed the split apart on as HIVE-4244 and HIVE-4245.
                
> ORC should have optional dictionaries for both strings and numeric types
> ------------------------------------------------------------------------
>
>                 Key: HIVE-4121
>                 URL: https://issues.apache.org/jira/browse/HIVE-4121
>             Project: Hive
>          Issue Type: New Feature
>          Components: Serializers/Deserializers
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>
> Currently string columns always have dictionaries and numerics are always directly encoded. It would be better to make the encoding depend on a sample of the data. Perhaps the first 100k values should be evaluated for repeated values and the encoding picked for the stripe.

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