polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Allow `pl.Duration` in `write_csv`
- Support python builtin `round`
- Creating frames with `List(Struct(...Categorical))` fails depending on order
- Polars can't read Arrow Run-End Encoded arrays
- predicate/projection pushdown causes ShapeError
- Should add that pl.expr.sum() replaces None with 0
- Improved DB Type Inference
- err: strptime panics (instead of erroring) for out-of-bounds dates
- perf: Add a VarInt encoding for the row encoding
- Saving parquet to AWS S3 with df.write_parquet() fails with FileNotFound
- Docs
- Rust not yet supported