polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Chaining `.list.eval`, `.value_counts` and `.struct.unnest` causes nondeterministic output
- Add support for parameterized queries in polars SQL
- `str.to_decimal` should have `scale` and `precision` parameters to avoid non-elementwise footgun
- `arr.shift` quietly allows shifting by strange types
- `list.gather` outputs invalid data if you give it a list of lists
- `cat.starts_with` and `cat.ends_with` only accept a string as argument
- Docs: Specify that the `Struct` type's keys retain their input/creation order
- Add `missing_columns` parameter for CSV
- Remove `allow_missing_columns: bool` in favor of `missing_columns: Literal["insert", "raise"]`
- Cache glob/path expansions during IR resolving.
- Docs
- Rust not yet supported