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Posted to issues@orc.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2018/06/04 22:51:00 UTC

[jira] [Resolved] (ORC-373) Option to disable dictionary encoding

     [ https://issues.apache.org/jira/browse/ORC-373?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Owen O'Malley resolved ORC-373.
-------------------------------
       Resolution: Fixed
    Fix Version/s: 1.6.0
                   1.5.2

I just committed this. Thanks, Prasanth!

> Option to disable dictionary encoding 
> --------------------------------------
>
>                 Key: ORC-373
>                 URL: https://issues.apache.org/jira/browse/ORC-373
>             Project: ORC
>          Issue Type: Bug
>    Affects Versions: 1.5.2
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>            Priority: Major
>             Fix For: 1.5.2, 1.6.0
>
>
> Currently dictionary check happens after creation of first row group entry. Even when row indexes are disabled, rows end up in red-black tree first before getting flushed during write stripe (into direct stream).
> If dictionary threshold is set to <= 0.0 disable dictionary, we should write directly to stream instead of RBTree. This is useful for hive streaming ingest where delta files explicitly disables dictionaries. 



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