polars · Issues· 2898 open

Perf: enable `O_DIRECT` for large Parquet file I/O

Streaming engine occasionally ignores `maintain_order` on right/full joins

Inconsistent `Date.mean()` between streaming and in-memory

DataFrame `n_unique()` ignores additional columns when the `subset` parameter is an expression or selector that selects multiple columns

Workspace feature system

Add `pl.Series.show`

Rolling computes the wrong window when offset is not the negation of period (in-memory engine)

SQL: an unaliased constant in the SELECT list of a `GROUP BY` query raises `unable to find column "literal"`

[Bug]: ColumnNotFoundError in `scan_iceberg(reader_override="pyiceberg")` on branching/self-join queries due to `cached_ir` projection overwrite

Add linear regression aggregation functions (regr_slope, regr_intercept, regr_r2, regr_count)

`read_json` silently drops offset, unlike `read_csv`

add `get_value` in `KeyedPartitionContext`

read_ndjson / scan_ndjson silently drop a key first seen past infer_schema_length, while read_json raises on the same records

Grouped streaming AsOf join uses a lot of memory when the right side has many group matches wrt the left side

pl.list fails to broadcast leading scalar input against column