polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Support arithmetic operations between numeric List Series and a scalar
- Make `ColumnNotFoundError` in `with_columns` as nice as it is in `columns` from `read_csv`
- Issue reading S3 files
- `write_ndjson` produces incorrect data that does not match dataframe
- Polars scan_iceberg inefficiently loads Iceberg table data into memory leading to out-of-memory errors
- Inconsistent default parameter in polars Rust vs Python rolling window
- Add `polars` to SQL query translation for databases (like `dbplyr`).
- assert_frame_equal's error is too verbose
- Parquet writer statistics for categorical/enum values have overall min/max instead of row_group min/max
- Parquet scanner doesn't do predicate pushdown for categoricals/enums
- Docs
- Rust not yet supported