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Magic method for alias, column, field

enhancementNew feature or an improvement of an existing featureNew feature or an improvement of an existing feature

Status: Open.

#27383 In pola-rs/polars;

· alippai opened on Apr 22, 2026

df.n_unique() to work on all columns by default

enhancementNew feature or an improvement of an existing featureNew feature or an improvement of an existing feature

Status: Open.

#27380 In pola-rs/polars;

· lmocsi opened on Apr 22, 2026

Error for strict streaming horizontal concat with elementwise operation

A-streamingRelated to the streaming engineRelated to the streaming engine

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-mediumPriority: mediumPriority: medium

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27372 In pola-rs/polars;

· coastalwhite opened on Apr 21, 2026

Full Join Panic: coalesce=True, suffix=""

A-panicArea: code that results in panic exceptionsArea: code that results in panic exceptions

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-mediumPriority: mediumPriority: medium

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27368 In pola-rs/polars;

· ph-ll-pp opened on Apr 21, 2026

rolling_*_by panics when by contains nulls

A-panicArea: code that results in panic exceptionsArea: code that results in panic exceptions

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27366 In pola-rs/polars;

· gautamvarmadatla opened on Apr 20, 2026

Concurrent scan_parquet(...).collect() on a file being rewritten triggers slice::get_unchecked UB in polars-stream/.../row_group_data_fetch.rs:112

A-io-parquetArea: reading/writing Parquet filesArea: reading/writing Parquet files

Status: Open.

#27365 In pola-rs/polars;

· alceal opened on Apr 20, 2026

Data corruption when reading with cloud IO in concurrent write scenario

A-io-cloudArea: reading/writing to cloud storageArea: reading/writing to cloud storage

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27362 In pola-rs/polars;

· provinzkraut opened on Apr 20, 2026

perf: LazyFrame.pivot on hive partition is slower that looping on each partition

acceptedReady for implementationReady for implementation

P-goalPriority: aligns with long-term Polars goalsPriority: aligns with long-term Polars goals

performancePerformance issues or improvementsPerformance issues or improvements

Status: Open.

#27342 In pola-rs/polars;

· FBruzzesi opened on Apr 17, 2026

Potential memory leak when sorting nested lists?

invalidA bug report that is not actually a bugA bug report that is not actually a bug

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27339 In pola-rs/polars;

· Fufs opened on Apr 16, 2026

Casting from string to list of enums fails.

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27336 In pola-rs/polars;

· gab23r opened on Apr 16, 2026

str.json_path_match returns null on invalid JSON instead of raising an error

A-io-jsonArea: reading/writing JSON filesArea: reading/writing JSON files

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

#27333 In pola-rs/polars;

· nhols opened on Apr 16, 2026

Feature Request: is_unique flag for columns

enhancementNew feature or an improvement of an existing featureNew feature or an improvement of an existing feature

Status: Open.

#27331 In pola-rs/polars;

· gab23r opened on Apr 16, 2026