polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Failing `Lazyframe.join` if onclauses are expressions and are using similar named columns
- Support BigQuery convention of loading stringified json columns with type: {type: "string", sqlType: "JSON"}
- `order` function to apply `descending` and `nulls_last` column by column in `sort`
- `LazyFrame::scan_parquet` should return `PolarsError::NoData` on empty folder scans
- Behavior of `DataFrame.sample(None)`
- docs: Add example and tests for `pl.concat()` with `Expr`
- Cannot merge DeltaTable when predicate is Decimal
- feat: Add `strict` parameter to `pl.concat(how='horizontal')`
- Allow polars.Expr.round to get negative decimals
- `profile` on simple filter return `Err("no data to time")`
- Docs
- Rust not yet supported