polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Strict construction of `List(Float64)` fails on whole numbers
- SQLStorm SQL Coverage
- Rename `truediv` and `floordiv` to `true_div` and `floor_div`
- SQL: unknown or alias-hidden names are accepted in correlated subquery
- fix: Preserve fractional seconds in hive partition paths for `Time` keys
- `DataFrame.join` on a sorted float key drops NaN matches (sorted-merge fast path compares with IEEE `==`)
- `scan_delta`: table opened several times when a scan is reused across plan branches (regression in 1.43)
- Partitioned write puts a NULL key and the string "__HIVE_DEFAULT_PARTITION__" into the same file: rows silently lost, file sometimes unreadable
- Allow explicit pruning of unused inputs in lazy horizontal concatenation
- INT96 timestamps inside a Map saturate although the schema requests Datetime("us")
- Docs
- Rust not yet supported