polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Minimal tests for memory usage contraints in partial-column read APIs
- Parquet row group filter pushdown not working as expected
- Larger integer value can not be found when using Parquet files with statistics
- Expand metadata to be able to track multi-column and group sort status + add lazyframe method to check whether a group or multicolumns are sorted
- Some S3 difficulties
- `offset_by` raises ambiguous datetime error for day light time change
- PanicException: skip_nulls does not work in map_elements when used on pl.struct
- from_dicts changes value when passing rows with nested dictionaries
- feat(python)!: Support decimals by default when converting from Arrow
- Add ability to offload dataframe storage to disk when running out of memory
- Docs
- Rust not yet supported