polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- fix: Return an empty Series when `diff(drop)` offset exceeds length
- Need for autoconf, automake and libtool undocumented?
- feat(python): Add `connection_options` parameter to `read_database_uri`
- fix: Respect named CSV "null_values" with `new_columns` and `with_column_names`
- `list.gather` annotation does not include `str` as column name for `indeces`, although it works at runtime.
- fix(rust): Don't count unterminated comment line at EOF as CSV row
- perf: Probe in-flight byte budget for cloud reads
- Parquet writer: dictionary-encodes high-cardinality columns where plain is much smaller; no way to opt out per column
- Polars List type in sink_parquet discards Pyarrow metadata
- Support for DenseUnion type
- Docs
- Rust not yet supported