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https://issues.apache.org/jira/browse/PARQUET-384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14990573#comment-14990573
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Daniel Weeks commented on PARQUET-384:
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https://github.com/apache/parquet-mr/pull/286
[~alexlevenson] Can you take a look at the changes I made to accommodate the
dictionary filter?
> Add Dictionary Based Filtering to Filter2 API
> ---------------------------------------------
>
> Key: PARQUET-384
> URL: https://issues.apache.org/jira/browse/PARQUET-384
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-mr
> Reporter: Daniel Weeks
> Assignee: Daniel Weeks
>
> Dictionary based predicate evaluation show very significant gains for certain
> cases like the following:
> - Sparse values in dictionary encoded columns
> - Data staged sorted by fields used in predicate evaluation
> This would be good to introduce into the filter2 API.
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