polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Broken exception handling in LazyFrame.pipe_with_schema()
- A `RuntimeError` (Size mismatch between request values and groupby keys) occurs when using the GPU engine
- column not found exception on meta.show_graph
- Optimize streaming group by to minimize cached rows when the group by keys are hive partitions or are in row groups with non-overlapping stats
- `pl.repeat` fails with object expression.
- Add optional file permission config to "write_*" methods
- Change type coercion casts for `is_in()` to be strict instead of lossy
- Filter On Literal Edge-Case Optimization
- Raise Error for sink_parquet() when an input filename is included in output filename
- Bad error message when comparing temporal to non-temporal dtype
- Docs
- Rust not yet supported