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Posted to issues-all@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2018/09/17 17:48:00 UTC

[jira] [Updated] (IMPALA-4123) Columnar decoding in Parquet scanner

     [ https://issues.apache.org/jira/browse/IMPALA-4123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong updated IMPALA-4123:
----------------------------------
    Attachment: 0001-WIP-IMPALA-4123-Columnar-decoding-in-Parquet.patch

> 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, perfomance
>         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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