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https://issues.apache.org/jira/browse/PARQUET-2245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17689088#comment-17689088
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ASF GitHub Bot commented on PARQUET-2245:
-----------------------------------------
zhongyujiang opened a new pull request, #1029:
URL: https://github.com/apache/parquet-mr/pull/1029
JIRA: [PARQUET-2245](https://issues.apache.org/jira/browse/PARQUET-2245)
This is a minor improvement for evaluating `notEq`. When evaluating `notEq`,
if the column may contain nulls and the `notEq` value is non-null, the
row-group must not be skipped. In such scenario reading dictionary and compare
values is not necessary.
> Improve dictionary filter evaluating notEq
> ------------------------------------------
>
> Key: PARQUET-2245
> URL: https://issues.apache.org/jira/browse/PARQUET-2245
> Project: Parquet
> Issue Type: Improvement
> Reporter: Yujiang Zhong
> Priority: Minor
>
> When evaluating `notEq`, if the column may contain nulls and the `notEq`
> value is non-null, the row-group must not be skipped. In such scenario
> reading dictionary and compare values is not necessary.
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