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https://issues.apache.org/jira/browse/PARQUET-645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julien Le Dem resolved PARQUET-645.
-----------------------------------
Resolution: Fixed
Issue resolved by pull request 348
[https://github.com/apache/parquet-mr/pull/348]
> DictionaryFilter incorrectly handles null
> -----------------------------------------
>
> Key: PARQUET-645
> URL: https://issues.apache.org/jira/browse/PARQUET-645
> Project: Parquet
> Issue Type: Bug
> Components: parquet-mr
> Affects Versions: 1.9.0
> Reporter: Ryan Blue
> Assignee: Ryan Blue
> Fix For: 1.9.0
>
>
> DictionaryFilter checks whether a column can match a query and filters out
> row groups that can't match. Equality checks don't currently handle null
> correctly, which is never in the dictionary and is encoded by the definition
> level. This is causing row groups to be filtered when they should not be
> because "col is null" is always true.
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