polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Polars expression context masks Python exceptions with keyword-only constructors
- Panic "validity mask length must match the number of values" reading a DELTA_BINARY_PACKED Int64 column with SPARSE nulls under a predicate
- fix: Fix high blocking thread use in sink_parquet with async local path
- fix: Any operation on `Unknown(Int)` and `Unknown(Float)` should result in `Unknown(Float)`
- refactor: Add row count and file byte size to sinked paths callback
- Grouped streaming AsOf join uses a lot of memory when the right side has many group matches wrt the left side
- Excessive thread use warning in `write_parquet`
- pl.cov does not return an exact zero when one column is constant
- PyO3-independent plugin crates
- feat(rust): Add PyO3-independent plugin crates
- Docs
- Rust not yet supported