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Incorrect type hint on <code>Series.sum()</code>

A-typingArea: type checkingArea: type checking

bugSomething isn't workingSomething isn't working

P-lowPriority: lowPriority: low

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#26626 In pola-rs/polars;

· jaredschwartz-ofs opened on Feb 19, 2026

Broken compatibility with <code>pd.Timedelta</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.

#26620 In pola-rs/polars;

· alex7hacs opened on Feb 19, 2026

ChildProcessCrashException (0xC0000005) with Dagster on Windows in VS Code debug mode — regression in &gt;= 1.32.2

bugSomething isn't workingSomething isn't working

needs triageAwaiting prioritization by a maintainerAwaiting prioritization by a maintainer

pythonRelated to Python PolarsRelated to Python Polars

regressionIssue introduced by a new releaseIssue introduced by a new release

Status: Open.

#26617 In pola-rs/polars;

· firespirit666 opened on Feb 19, 2026

Coerce literal to dtype of non-literal side for comparisons where possible

A-optimizerArea: plan optimizationArea: plan optimization

acceptedReady for implementationReady for implementation

performancePerformance issues or improvementsPerformance issues or improvements

Status: Open.

#26613 In pola-rs/polars;

· nameexhaustion opened on Feb 18, 2026

Move projection pushdown to take place after predicate pushdown

A-optimizerArea: plan optimizationArea: plan optimization

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.

#26611 In pola-rs/polars;

· nameexhaustion opened on Feb 18, 2026

Export using <code>arrow_schema</code> with <code>nullable: false</code> on list values array raises on NULL values masked out on the list level

A-interop-arrowArea: interoperability with other Arrow implementations (such as pyarrow)Area: interoperability with other Arrow implementations (such as pyarrow)

acceptedReady for implementationReady for implementation

bugSomething isn't workingSomething isn't working

P-lowPriority: lowPriority: low

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#26600 In pola-rs/polars;

· nameexhaustion opened on Feb 18, 2026

Accept arrow schema / field for <code>DataFrame.to_arrow()/Series.to_arrow()</code>

A-apiArea: changes to the public APIArea: changes to the public API

A-interopArea: interoperability with other librariesArea: interoperability with other libraries

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

P-lowPriority: lowPriority: low

Status: Open.

#26599 In pola-rs/polars;

· nameexhaustion opened on Feb 18, 2026

CSV <code>pl.len()</code> fails in async context with schema provided

A-io-csvArea: reading/writing CSV filesArea: reading/writing CSV files

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.

#26594 In pola-rs/polars;

· kdn36 opened on Feb 17, 2026

Insert IR-level slice before <code>select(all().head/tail(N))</code>

A-optimizerArea: plan optimizationArea: plan optimization

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

performancePerformance issues or improvementsPerformance issues or improvements

Status: Open.

#26592 In pola-rs/polars;

· nameexhaustion opened on Feb 17, 2026

Build pyarrow predicates via pyarrow API instead of string formatting / eval in <code>predicate_to_pa</code>

A-interop-arrowArea: interoperability with other Arrow implementations (such as pyarrow)Area: interoperability with other Arrow implementations (such as pyarrow)

A-optimizerArea: plan optimizationArea: plan optimization

internalAn internal refactor or improvementAn internal refactor or improvement

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

P-lowPriority: lowPriority: low

pythonRelated to Python PolarsRelated to Python Polars

Status: Open.

#26591 In pola-rs/polars;

· nameexhaustion opened on Feb 17, 2026

Implement predicate pushdown for aliased groupby queries

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

Status: Open.

#26589 In pola-rs/polars;

· jberg5 opened on Feb 16, 2026

sink_delta out of memory while sink_parquet works fine

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.

#26586 In pola-rs/polars;

· boccileonardo opened on Feb 16, 2026