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Fix pl.Expr.concat_str with boolean columns in cudf_polars #21145

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Fix pl.Expr.concat_str with boolean columns in cudf_polars #21145

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@mroeschke mroeschke commented Jan 22, 2026

Description

closes pola-rs/polars#26186

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  • I am familiar with the Contributing Guidelines.
  • New or existing tests cover these changes.
  • The documentation is up to date with these changes.

@mroeschke
Fix concat_str with boolean columns in cudf_polars
b3285fe 
Add support for boolean to string casting in _handle_string_cast
by using from_booleans to convert True/False to "true"/"false",
matching Polars CPU behavior.

Closes pola-rs/polars#26186
@mroeschke mroeschke self-assigned this Jan 22, 2026
@mroeschke mroeschke added the bug Something isn't working label Jan 22, 2026
@mroeschke mroeschke requested a review from a team as a code owner January 22, 2026 23:01
@mroeschke mroeschke added Python Affects Python cuDF API. non-breaking Non-breaking change labels Jan 22, 2026
@github-actions github-actions bot added the cudf-polars Issues specific to cudf-polars label Jan 22, 2026
@GPUtester GPUtester moved this to In Progress in cuDF Python Jan 22, 2026
@mroeschke mroeschke mentioned this pull request Jan 22, 2026
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@TomAugspurger TomAugspurger Awaiting requested review from TomAugspurger TomAugspurger is a code owner automatically assigned from rapidsai/cudf-python-codeowners

@galipremsagar galipremsagar Awaiting requested review from galipremsagar galipremsagar is a code owner automatically assigned from rapidsai/cudf-python-codeowners

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@mroeschke mroeschke

@Matt711 Matt711

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bug Something isn't working cudf-polars Issues specific to cudf-polars non-breaking Non-breaking change Python Affects Python cuDF API.

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cuDF Python
Status: In Progress

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Successfully merging this pull request may close these issues.

An InvalidOperationError (Unsupported casting from <type_id.BOOL8: 11> to <type_id.STRING: 23> will occur when using pl.concat_str() and the GPU engine.

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@mroeschke @Matt711