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Sorting with maintain_order does not maintain order (when there are Nulls present)

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-highPriority: highPriority: high

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27514 In pola-rs/polars;

· dsprenkels opened on May 5, 2026

Concatenation of different Extension dtype should probably raise

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-highPriority: highPriority: high

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27512 In pola-rs/polars;

· gab23r opened on May 5, 2026

No response from security@polars.tech

Status: Open.

#27511 In pola-rs/polars;

· ksj1230 opened on May 5, 2026

Scan parquet with unique blows up memory usage

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

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.

#27510 In pola-rs/polars;

· maroshmka opened on May 5, 2026

enh: adbc-commit-control for write_database

A-io-databaseArea: reading/writing to databasesArea: reading/writing to databases

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

Status: Open.

#27500 In pola-rs/polars;

· Rebant opened on May 4, 2026

Add cargo-fuzz / OSS-Fuzz coverage for polars-arrow / polars-parquet / polars-json readers

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

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

Status: Open.

#27488 In pola-rs/polars;

· youichi-uda opened on May 3, 2026

group_by_dynamic: Some rows missing when using overlapping windows and the group_by option

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.

#27484 In pola-rs/polars;

· user234683 opened on May 2, 2026

Appending writes for parquet/ipc

A-io-ipcArea: reading/writing IPC filesArea: reading/writing IPC files

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

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

Status: Open.

#27481 In pola-rs/polars;

· pm1000 opened on May 2, 2026

Broadcast scalar list input for list.slice

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

Status: Open.

#27480 In pola-rs/polars;

· nameexhaustion opened on May 1, 2026

Join or group_by/explode performance issue

bugSomething isn't workingSomething isn't working

needs reproBug does not yet have a reproducible exampleBug does not yet have a reproducible example

performancePerformance issues or improvementsPerformance issues or improvements

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#27478 In pola-rs/polars;

· jrothbaum opened on May 1, 2026

Add list.from_offsets to create list items from a continuous array

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

Status: Open.

#27474 In pola-rs/polars;

· coastalwhite opened on May 1, 2026

Add a sortedness check to the streaming merge join node

A-streamingRelated to the streaming engineRelated to the streaming engine

acceptedReady for implementationReady for implementation

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

P-mediumPriority: mediumPriority: medium

Status: Open.

#27458 In pola-rs/polars;

· dsprenkels opened on Apr 30, 2026