polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Regression in v1.32.0 onwards - list-of-structs in group_by map_elements being flattened into just a single struct
- Feat: a single API that works for creating 0-N length arrays of both literals and expressions
- feat(python): Generalize type annotation for `Series` values input
- `SELECT <lit> FROM table WHERE FALSE` returns `<lit>` in SQL query
- Ensure SQL division returns a float when required
- Rename 'aggregate_function' parameter to 'agg' (API consistency)
- fix(python): Suggest str.contains for string containment in map_elements
- Error in JSON se/deserialization of nulls in LazyFrame
- Features lazy + range have an undeclared dependency on moment
- `group().agg(<datetime>.mean())` result is incorrect while using the GPU engine
- Docs
- Rust not yet supported