polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Non deterministic error writing and then reading parquet files with column of type List(Catergorical) where the Categorical is nullable
- Allow skipping non-matching schema in json_decode
- Enable "partition_by" for "sink_parquet" function
- Scan_parquet should filter on partitions before evaluating schema
- Cloud writers for different formats directly on rust side.
- feat: Support max/min method for Time dtype
- Should `pl.concat()` accept `Expr` input?
- Push down selections into joins
- `cum_fold_exprs` does not broadcast a `lit()` initial `acc` to the correct length
- pl.read_csv() columns parameter broken when used with skip_rows and has_header which is common use case
- Docs
- Rust not yet supported