polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- feat: Support named options in SQL `read_parquet` table function
- perf: Widen skip-batch null_count for mapped struct columns instead of nulling it
- fix: Only parse hive partitions below the table root in `scan_delta`
- feat: Add foldv for stateful processing
- feat(python): Allow foreign types to implement binary operators against `Expr`
- perf: Rewrite the sum of a column plus a literal to a sum and a count of the column
- Run constant folding bottom up instead of top down.
- perf: Fix dead early exit in `coalesce`
- fix: Error on mismatched length in zip node when input data has one row
- Constant folding replicates rules from the engine and leaves many gaps unimplemented
- Docs
- Rust not yet supported