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Posted to dev@hive.apache.org by "Kevin Wilfong (JIRA)" <ji...@apache.org> on 2013/04/10 18:56:18 UTC

[jira] [Updated] (HIVE-4324) ORC Turn off dictionary encoding when number of distinct keys is greater than threshold

     [ https://issues.apache.org/jira/browse/HIVE-4324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kevin Wilfong updated HIVE-4324:
--------------------------------

    Attachment: HIVE-4324.1.patch.txt
    
> ORC Turn off dictionary encoding when number of distinct keys is greater than threshold
> ---------------------------------------------------------------------------------------
>
>                 Key: HIVE-4324
>                 URL: https://issues.apache.org/jira/browse/HIVE-4324
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Serializers/Deserializers
>    Affects Versions: 0.11.0
>            Reporter: Kevin Wilfong
>            Assignee: Kevin Wilfong
>         Attachments: HIVE-4324.1.patch.txt
>
>
> Add a configurable threshold so that if the number of distinct values in a string column is greater than that fraction of non-null values, dictionary encoding is turned off.

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