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https://issues.apache.org/jira/browse/IMPALA-4864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong reassigned IMPALA-4864:
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Assignee: (was: Zach Amsden)
> Speed up binary predicates against dictionary encoded Parquet data by
> converting the predicates to their codewords
> ------------------------------------------------------------------------------------------------------------------
>
> Key: IMPALA-4864
> URL: https://issues.apache.org/jira/browse/IMPALA-4864
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 2.9.0
> Reporter: Mostafa Mokhtar
> Priority: Major
> Labels: performance
>
> Selective binary predicates against dictionary-encoded columns can be speeded
> up by converting the original predicates on the column type to predicates on
> the dictionary codewords, this should help avoid expensive comparisons.
> Similar to Kudu
> https://kudu.apache.org/2016/09/16/predicate-pushdown.html
> https://github.com/cloudera/kudu/commit/c0f37278cb09a7781d9073279ea54b08db6e2010
> https://github.com/cloudera/kudu/commit/ec80fdb37be44d380046a823b5e6d8e2241ec3da
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