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col refernces wrong dataframe

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.

#26829 In pola-rs/polars;

· lokxii opened on Mar 6, 2026

Cast col behaviour not as expected within a when then statement

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.

#26825 In pola-rs/polars;

· lmcsiro opened on Mar 6, 2026

Incorrect slice->filter optimization

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-criticalPriority: criticalPriority: critical

pythonRelated to Python PolarsRelated to Python Polars

regressionIssue introduced by a new releaseIssue introduced by a new release

Status: Open.

#26824 In pola-rs/polars;

· nameexhaustion opened on Mar 5, 2026

Python hang/deadlock when <code>DataFrame.to_numpy()</code> runs concurrently with multiple <code>map_elements</code>

A-interop-numpyArea: interoperability with NumPyArea: interoperability with NumPy

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.

#26821 In pola-rs/polars;

· hsahovic opened on Mar 5, 2026

Slice after filter no longer pushed

A-optimizerArea: plan optimizationArea: plan optimization

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-mediumPriority: mediumPriority: medium

performancePerformance issues or improvementsPerformance issues or improvements

pythonRelated to Python PolarsRelated to Python Polars

regressionIssue introduced by a new releaseIssue introduced by a new release

Status: Open.

#26816 In pola-rs/polars;

· nameexhaustion opened on Mar 5, 2026

Predicate pushdown in IO Plugins documentation

A-pluginArea: things related to pluginsArea: things related to plugins

documentationImprovements or additions to documentationImprovements or additions to documentation

Status: Open.

#26814 In pola-rs/polars;

· exyi opened on Mar 5, 2026

is_in predicate pushdown silently broken for scan_pyarrow_dataset since 1.28

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-mediumPriority: mediumPriority: medium

performancePerformance issues or improvementsPerformance issues or improvements

regressionIssue introduced by a new releaseIssue introduced by a new release

rustRelated to Rust PolarsRelated to Rust Polars

Status: Open.

#26802 In pola-rs/polars;

· erandagan opened on Mar 4, 2026

cum_sum with lit gives random incorrect results

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.

#26800 In pola-rs/polars;

· xbr32 opened on Mar 4, 2026

Parsing ambiguous timestamps in <code>polars.from_repr</code>

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.

#26797 In pola-rs/polars;

· denisrossetre opened on Mar 4, 2026

pl.first() to support pl.all()

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

Status: Open.

#26791 In pola-rs/polars;

· lmocsi opened on Mar 4, 2026

Dynamic string replacement fails when <code>POLARS_MAX_THREADS=1</code>

A-dtype-stringArea: string data typeArea: string data type

A-streamingRelated to the streaming engineRelated to the streaming engine

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

good first issueGood for newcomersGood for newcomers

P-mediumPriority: mediumPriority: medium

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#26789 In pola-rs/polars;

· dsprenkels opened on Mar 4, 2026

Segfault with <code>pl.concat(..., how="align")</code>

bugSomething isn't workingSomething isn't working

P-highPriority: highPriority: high

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#26788 In pola-rs/polars;

· mferrera opened on Mar 4, 2026