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[FEA] Support merge_sorted with key sorted in descending order #21511

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Matt711 opened this issue Feb 27, 2025 · 0 comments
Open

[FEA] Support merge_sorted with key sorted in descending order #21511

Matt711 opened this issue Feb 27, 2025 · 0 comments
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enhancement New feature or an improvement of an existing feature

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Matt711 commented Feb 27, 2025

Description

Polars currently only guarantees correct results when merging frames where the key is sorted in ascending order. We should add support when the key is sorted in descending order. I don't think we support this in the new streaming engine either, so we should do that too.

Some context in #21464
@Matt711 Matt711 added the enhancement New feature or an improvement of an existing feature label Feb 27, 2025
@Matt711 Matt711 mentioned this issue Feb 27, 2025
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