polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Maturin build error: unknown refstorage format
- Support the IEEE 754 total order column order in Parquet (PARQUET-2249)
- fix(rust): Implement deserializing u128 from parquet as written by polars.
- Optimization: use IEEE-754 total order `nan_count` to enable float `>=` row-group skipping
- `pl.any()`/`pl.all()` requires boolean input, but `pl.any_horizontal()`/`pl.all_horizontal()` casts to boolean
- docs: Clarify when-then-otherwise filtering
- PartitionBy in lazy streaming occasionally overwrites string data with null bytes
- perf(rust): Streaming row-group pruning with Parquet bloom filters
- Incorrect results for `over(nulls_last=True)` on multiple `order_by`
- Polars does not close SQLAlchemy connection after `pl.read_database(iter_batches=True)`
- Docs
- Rust not yet supported