kdn36 opened a new issue, #48883: URL: https://github.com/apache/arrow/issues/48883
### Describe the bug, including details regarding any error messages, version, and platform. Ref https://github.com/pola-rs/polars/issues/26126 and https://github.com/apache/arrow/pull/43950/changes#top Clarification request: is the 'uncompressed length' field for a compressed bitmap buffer defined as (a) exactly the length in bytes rounded up to the nearest byte size (i.e., `n.div_ceil(8)` for `n` bits), or (b) any possible length in bytes rounded up to a given word size (e.g. `n.div_ceil(32)*4` for `n` bits). In the case of 5 rows, (a) would imply exactly 1 byte uncompressed size, while (b) would allow 4 bytes uncompressed size. ### Component(s) Documentation, Format -- 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]
