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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