alamb opened a new issue, #8748: URL: https://github.com/apache/arrow-rs/issues/8748
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** - part of The parquet community is considering adding new encodings to the format. One proposed encoding is: * ALP: [Proposal: ALP : Floating Point Encoding for Parquet](https://docs.google.com/document/d/1PlyUSfqCqPVwNt8XA-CfRqsbc0NKRG0Kk1FigEm3JOg/edit?tab=t.0#heading=h.5xf60mx6q7xk) ([mailing list thread](https://lists.apache.org/thread/tjtln1mmjqfoql1ls2dw9xpdk91r1909)) **Describe the solution you'd like** I would like someone(s) to create a branch of arrow-rs 's parquet reader and implement this proposed encoding in the context of parquet to see how it would work. This would involve likely 1. Adding a new encoding to the metadata: [source link](https://github.com/apache/arrow-rs/blob/78bd20446c1cc54b398e925021933c14cb7784be/parquet/src/basic.rs#L573-L572) 2. Add the appropriate encoder/decoders in parquet ([existing code](https://github.com/apache/arrow-rs/blob/dfc7ef8a3c4ddba1983a16a35d46e004a2e1ad06/parquet/src/encodings/mod.rs#L18-L20)) 3. Add some basic tests showing data could be round tripped with these encodings: [examples of similar tets here](https://github.com/apache/arrow-rs/blob/5a384f4c3ccd397dcb8763d89e958da3fa4c666c/parquet/src/arrow/arrow_writer/mod.rs#L1521-L1752) 4. Add some benchmarks: [examples of similar benchmarks](https://github.com/apache/arrow-rs/blob/02fa779a9cb122c5218293be3afb980832701683/parquet/benches/encoding.rs#L98-L97) Here are some existing crates - https://crates.io/crates/alp - https://crates.io/crates/vortex-alp (maybe [this code](https://crates.io/crates/vortex-alp)) **Describe alternatives you've considered** <!-- A clear and concise description of any alternative solutions or features you've considered. --> **Additional context** <!-- Add any other context or screenshots about the feature request here. --> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
