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Apply a UDF on object columns with an expression

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

Status: Open.

#25548 In pola-rs/polars;

· gab23r opened on Nov 29, 2025

Implementation of a correlation matrix for DataFrame in Rust

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

Status: Open.

#25545 In pola-rs/polars;

· AliothCancer opened on Nov 29, 2025

A panic (dtype is unknown) occurred while using streaming engines

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.

#25544 In pola-rs/polars;

· asddfl opened on Nov 29, 2025

<code>Hash</code> impl incorrect for <code>AnyValue::String</code> and <code>AnyValue::StringOwned</code>

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

rustRelated to Rust PolarsRelated to Rust Polars

Status: Open.

#25542 In pola-rs/polars;

· macmv opened on Nov 29, 2025

.map_elements(f).over() receives different objects in user function between 1.31.0 and 1.32.0

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.

#25541 In pola-rs/polars;

· ruoyu0088 opened on Nov 29, 2025

Passing non-elementwise exprs to <code>PartitionByKey</code> succeeds with unspecified output

A-io-partitioningArea: reading/writing (Hive) partitioned filesArea: reading/writing (Hive) partitioned files

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.

#25535 In pola-rs/polars;

· nameexhaustion opened on Nov 28, 2025

Partition sink with <code>include_key=False</code> outputs empty dataset if no non-key columns exist

A-io-partitioningArea: reading/writing (Hive) partitioned filesArea: reading/writing (Hive) partitioned files

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.

#25534 In pola-rs/polars;

· nameexhaustion opened on Nov 28, 2025

rolling_std/var/cov/corr performance scales with window size, unlike rolling_sum/mean/min/max

bugSomething isn't workingSomething isn't working

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

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#25530 In pola-rs/polars;

· kaixiongg opened on Nov 28, 2025

<code>PanicException: assertion failed: i &lt; self.len()</code> during <code>lazy_frame.collect()</code>

bugSomething isn't workingSomething isn't working

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

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#25525 In pola-rs/polars;

· martrobenrmk opened on Nov 27, 2025

No optimization of filter predicates for literals

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.

#25520 In pola-rs/polars;

· lscheilling opened on Nov 27, 2025

Add version information to individual methods and arguments.

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

#25519 In pola-rs/polars;

· MatthiasRoels opened on Nov 27, 2025

Polars GPU engines get a segmentation fault while <code>select(&lt;boolean row&gt;)</code>

A-gpuArea: gpu engineArea: gpu engine

bugSomething isn't workingSomething isn't working

P-criticalPriority: criticalPriority: critical

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#25518 In pola-rs/polars;

· asddfl opened on Nov 27, 2025