polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Option for scan_parquet to use schema of last partition
- In streaming mode, `.limit()` doesn't return early after join operations
- feat: Allow named column references in `eval` expressions
- fix(rust): Don't silently drop extra struct fields under a strict Expr::cast
- Rolling functions allow specifying negative weights
- fix: Disallow rolling functions negative weights
- fix(python): Fix `filter`/`remove` raising `TypeError` when all predicates are no-op scalars
- fix: Raise instead of panicking when a dtype cannot be row encoded
- fix: Treat scalar columns as having no chunk layout
- perf(rust): Sort Categorical lexically via map -> sort -> unmap
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- Rust not yet supported