polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Fail to compile without the `parquet` feature
- pl.lit integer list literals with null-only or empty nested siblings infer Int64
- fix(python): Infer int widths for list literals
- Support the IEEE 754 total order column order in Parquet (PARQUET-2249)
- add a sync mode for LazyFrame.map_batches
- fix: Improve error for aliasing expanded aggregations
- fix(rust): Implement deserializing u128 from parquet as written by polars.
- Optimization: use IEEE-754 total order `nan_count` to enable float `>=` row-group skipping
- Delta Lake schema collection for Array dtypes breaks
- `pl.any()`/`pl.all()` requires boolean input, but `pl.any_horizontal()`/`pl.all_horizontal()` casts to boolean
- Docs
- Rust not yet supported