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Posted to issues@impala.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2019/10/15 13:29:00 UTC

[jira] [Created] (IMPALA-9043) Consider replacing the ORC lib with a native ORC reader

Quanlong Huang created IMPALA-9043:
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             Summary: Consider replacing the ORC lib with a native ORC reader
                 Key: IMPALA-9043
                 URL: https://issues.apache.org/jira/browse/IMPALA-9043
             Project: IMPALA
          Issue Type: New Feature
            Reporter: Quanlong Huang


The existing ORC lib provides limited interfaces for optimizations. E.g. no interfaces for predicate pushdown.

We may need to implement our native ORC reader for thorough performance improvement. There are some common logics with Parquet reader that we can re-use, e.g. column encoding/decoding.



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