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https://issues.apache.org/jira/browse/PARQUET-2435?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved PARQUET-2435.
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Fix Version/s: format-2.11.0
Resolution: Fixed
Resolved by linked PR.
> Clarify behavior of DELTA_BINARY_PACKED encoders/decoders
> ---------------------------------------------------------
>
> Key: PARQUET-2435
> URL: https://issues.apache.org/jira/browse/PARQUET-2435
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-format
> Reporter: Edward Seidl
> Assignee: Edward Seidl
> Priority: Minor
> Fix For: format-2.11.0
>
>
> I brought this issue up on some time ago on the mailing list [1]; in short I
> would like to add some clarification to the DELTA_BINARY_PACKED section of
> Encodings.md. The issue is that while the specification does not limit the
> number of bits that can be used to encode deltas, some readers expect a
> maximum of 32 bits for INT32 data, and 64 bits for INT64 data [2]. I propose
> adding verbiage to the specification to the effect that while using 33 bits
> to encode INT32 data (or 65 for INT64), it is not recommended, and that
> readers _should_ be able to read such data, but are not required to.
>
>
> [1] [https://lists.apache.org/thread/2wj88oghc0t6qqj8ojp5p5tf8wg11840]
> [2] https://github.com/apache/arrow/issues/20374
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