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https://issues.apache.org/jira/browse/PARQUET-1059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16086979#comment-16086979
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Uwe L. Korn commented on PARQUET-1059:
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Can you describe a workload where this would bring a significant difference?
The need of delta encoding in the dictionary indices rather indicates that you
have many distinct values in the column.
> Improve the RLE encoding for Parquet Dictionary IDs
> ---------------------------------------------------
>
> Key: PARQUET-1059
> URL: https://issues.apache.org/jira/browse/PARQUET-1059
> Project: Parquet
> Issue Type: Improvement
> Reporter: Dapeng Sun
>
> The IDs of Parquet Dictionary encoding is using
> {{RunLengthBitPackingHybridEncoder}}.
> RunLengthBitPackingHybridEncoder handles encoding with {{repeat}} and
> {{bitpacking}}, we should improve it with the method likes
> {{DeltaBinaryPackingWriter}}
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