polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Unclear error message in `explode()` at the Expr level when collecting with the streaming engine
- Implementing different interpretation of what a Categorical is (see pandas, R/dplyr, ...)
- `write_database` to postgresql with adbc increases values of `pl.Decimal` by a factor of 10 or more
- fix(python): Enable manual commits for `write_database` with the ADBC engine
- Polars should allow `.cast(pl.Datetime)` where `pl.col('col_name').str.to_datetime()` would work.
- Regression in v1.32.0 onwards - list-of-structs in group_by map_elements being flattened into just a single struct
- `nulls_last` silently ignored in `over` - raise instead?
- 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
- Docs
- Rust not yet supported