polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Add `extra_columns` parameter to all native scan functions and make default behavior consistent
- Add option to save ipc files with regular arrow string type instead of large_string
- `is_in` lowering in streaming `group_by` goes to in-memory map
- write_excel options
- Coalesce equality expressions in `join_where()`?
- `scan_csv` with multiple files uses all-str schema if one file is empty
- polars.exceptions.ColumnNotFoundError when using nested column in GROUP BY
- Add `(missing|extra)_columns` parameter to `DataFrame/LazyFrame` constructors
- Unable to enable feature parquet in Cargo.toml
- Add by_function() to Column Selectors for flexible filtering by column name
- Docs
- Rust not yet supported