coracuity opened a new issue, #9242: URL: https://github.com/apache/arrow-rs/issues/9242
I'm converting between file formats in [silk-chiffon](https://github.com/acuitymd/silk-chiffon) and I'm working on making the Parquet files we write as optimal as possible. To achieve that I need to buffer an entire row group in memory, perform cardinality analysis on it, then based on that decide whether it's worth using dictionary encoding and/or bloom filters (and the NDV for the latter!). This is how DuckDB writes out Parquet and it leads to some very tidy and fast Parquet files. Doing this in the Parquet crate requires that I be able to use a different WriterProperties value per row group, and as far as I can tell the only to do that is the deprecated [get_column_writers](https://github.com/apache/arrow-rs/blob/d60b1cd7d60007382bf84c58ac7ba2626d887e19/parquet/src/arrow/arrow_writer/mod.rs#L427-L438). So the request is this: can we add a blessed way to do this? If we were to do that, and if someone were want to contribute it back (👀), where would that fit into the API? Thanks so much! -- 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]
