polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- perf: Sort decimals of up to 18 digits on their i64 view
- fix: Fix NDJSON reader panic for Int8, Int16, UInt8, UInt16, Time and…
- Allow explicit pruning of unused inputs in lazy horizontal concatenation
- Streaming: unordered union (pl.union / SQL UNION ALL) of N CSV scans holds every input at once — 7x the memory of pl.concat
- INT96 timestamps inside a Map saturate although the schema requests Datetime("us")
- 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`
- Docs
- Rust not yet supported