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Posted to dev@orc.apache.org by "Prasanth Jayachandran (JIRA)" <ji...@apache.org> on 2018/06/02 01:39:00 UTC

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

Prasanth Jayachandran created ORC-373:
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             Summary: 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


Currently dictionary check happens after first creating first row group entry. Even when row indexes are disabled, rows end up in red-black tree first before getting flushed during write stripe.
If dictionary threshold is set to <= 0.0 disable dictionary and write directly to stream. This is useful for hive streaming ingest where delta files explicitly disables dictionaries. 



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