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https://issues.apache.org/jira/browse/IMPALA-4123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Csaba Ringhofer updated IMPALA-4123:
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Labels: parquet performance (was: parquet perfomance)
> Columnar decoding in Parquet scanner
> ------------------------------------
>
> Key: IMPALA-4123
> URL: https://issues.apache.org/jira/browse/IMPALA-4123
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 2.8.0
> Reporter: Tim Armstrong
> Assignee: Tim Armstrong
> Priority: Major
> Labels: parquet, performance
> Fix For: Impala 3.2.0
>
> Attachments: 0001-WIP-IMPALA-4123-Columnar-decoding-in-Parquet.patch
>
>
> Apache Parquet have some nice performance improvements to bit-packed decoding
> in their Parquet scanner (which is derived from Impala's):
> https://github.com/apache/parquet-cpp/pull/140
> We should do something similar - i.e. switch to more of a batch-oriented
> approach to decoding rather than value-at-a-time
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