Repository Issue Activity (beta)

#28614 Support vertical sum aggregation for fixed-size Array columns

#26880 Separator for pivot columns when multiple values passed to 'on'

#28416 Do one final scan of deprecated items that we want to remove for 2.0

#28945 Polars 1.44.0 panics in `collect_all` with a filtered manual cache inside `concat`

#28941 Nested when/then inside otherwise takes the wrong branch for null conditions since 1.44.0

#28943 df.filter(True, True) raises TypeError while df.filter(True) and df.filter() both return all rows

#24431 Dtype inconsistent when dividing `Float32` by default int vs unknown

#28918 What is the input-length contract for elementwise UDFs and expression plugins?"

#8385 Support for Map DataType

#28932 `PanicException`: `.item()` broken for `null: List[struct]`

#28766 Datatypes have an inconsistent repr (not PEP 585-complaint?)

#28771 Support integer dtypes in arr.dot

#28930 Define compatibility policy between polars[gpu] and cudf-polars

#28931 Document versioned GPU-engine capability boundaries

#28928 Expose fixed-size Array inner product in Polars SQL

#22820 `scan_csv` with multiple files uses all-str schema if one file is empty

#26502 Common subplan elimination is pessimized by filters

#21710 Missed optimization: transform multi-attribute equality joins into filter + single-attribute join

#28912 High memory use on `scan_parquet` with multiple files

#27943 Soundness: unchecked integer overflow in polars-arrow allows UB in safe Rust code

#26148 Polars 2.0 release roadmap

#28679 Needs Decision: Any to implement for 2.0?

#28908 kernel crashes when using scan_iceberg with absolute path to the metadata

#28776 `POLARS_AUTO_STRUCTIFY` env var still works after `Config.set_auto_structify` was removed in 2.0

#28875 SQL: LEFT JOIN with a range predicate in ON drops unmatched left rows and behaves as INNER JOIN