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From "Kevin Wilfong (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (HIVE-4244) Make string dictionaries adaptive in ORC
Date Thu, 28 Mar 2013 19:01:17 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kevin Wilfong reassigned HIVE-4244:
-----------------------------------

    Assignee: Kevin Wilfong  (was: Owen O'Malley)
    
> Make string dictionaries adaptive in ORC
> ----------------------------------------
>
>                 Key: HIVE-4244
>                 URL: https://issues.apache.org/jira/browse/HIVE-4244
>             Project: Hive
>          Issue Type: Bug
>          Components: Serializers/Deserializers
>            Reporter: Owen O'Malley
>            Assignee: Kevin Wilfong
>
> The ORC writer should adaptively switch between dictionary and direct encoding. I'd propose
looking at the first 100,000 values in each column and decide whether there is sufficient
loading in the dictionary to use dictionary encoding.

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