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 passing of empty list to filter method
- Streaming engine does not set sortedness flags for sorted join outputs
- Type of schema_overrides in read_csv not compatible with the implementation
- perf: Tighten redundant comparisons and propagate filter constraints
- feat: Add `list` expression which consistently packs elements together into new List type
- Consider renaming `.with_columns()` to a more consistent, verb-based alternative
- ShapeError during lazy evaluation of coalesce when DataFrame is read from a csv without trailing newline
- LazyFrame retains dropped embedded-Series literals in its plan — no way to shed them without materializing
- .update is 3 years old - should it be consider stable?
- sink_parquet rarely deadlocks — all polars-async executor threads parked while main thread awaits in run_subgraph
- Docs
- Rust not yet supported