polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Use of `sorting_columns` parquet metadata
- SQL query with WHERE clause that evaluates to true/false gives ShapeError on DataFrame with null columns
- `reshape` in group_by context PanicException
- docs: to_datetime: document that %Y zero-pads years
- `AWS_ENDPOINT_URL` not inferred by cloud I/O
- read_json cannot parse a simple json array
- Add feature gates to `polars-stream`
- `AWS_PROFILE` should be supported in cloud storage I/O config
- Ability to append to an existing directory of parquet files with new partitions (mode=append)
- Ambigiuous column names in join_where require post-join names
- Docs
- Rust not yet supported