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https://issues.apache.org/jira/browse/IMPALA-9043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong updated IMPALA-9043:
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Component/s: Backend
> 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
> Components: Backend
> Reporter: Quanlong Huang
> Priority: Major
>
> 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.
> There is a related discussion in the email-list when we first supported
> reading ORC:
> [https://lists.apache.org/thread.html/bc692b9fb526b24499ca70e3f3f4fc258e1ec9edbc7bfe55c0a2b602%40%3Cdev.impala.apache.org%3E]
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