polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Unexpected behavior when chaining `scan_csv`, `with_row_index` and `collect`
- fix: Allow more than one dictionary encoded data page per column chunk in parquet
- fix(rust): Fix pl.datetime to follow leftmost-argument naming rule
- `group_by` with filtering on exploded expression throws `ShapeError` for LazyFrames
- Add a range datatype (date range / datetime range) and supporting functions
- `pl.Expr().struct.unnest` gives wrong results in some edge cases
- PanicException on Expr.str.to_datetime, but only in Github Actions, in pl >= 1.15
- `unnest()` accepts `pl.col()` input for LazyFrame but not DataFrame
- Add support for setting `null_values` for each column separately in `(read|scan)_csv` functions
- feat: Add `assert_err` and `assert_warn`
- Docs
- Rust not yet supported