polars
https://github.com/pola-rs/polars
Rust
Dataframes powered by a multithreaded, vectorized query engine, written in Rust
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- Issues
- Unify `read` and `scan` functions
- `cast` to `datetime` doesn't preserve timezone
- polars.exceptions.ColumnNotFoundError after left join using ctx.execute(select )
- Allow `step`/`interval` parameter in `ranges` functions to take an expression
- Implement write_bytes and sink_bytes IO functions
- `failed to determine supertype of datetime[ns, UTC] and datetime[ns]` for when-then-otherwise expression that yields NULL
- Julian
- option for compliance of pure rust written parquets with nested fields
- Globbing support for multiple JSON (not ndjson) files?
- Type Casting string to date does not for list of dicts
- Docs
- Rust not yet supported