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What changes were proposed in this pull request?

Add support for axis argument for idxmax.

Why are the changes needed?

To support a missing API parameter

Does this PR introduce any user-facing change?

Yes, a new API

How was this patch tested?

CI

Was this patch authored or co-authored using generative AI tooling?

Co-authored-by: Claude Sonnet 4.5

devin-petersohn and others added 2 commits January 28, 2026 09:47
Signed-off-by: Devin Petersohn <[email protected]>
Co-authored-by: Devin Petersohn <[email protected]>
Signed-off-by: Devin Petersohn <[email protected]>
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JIRA Issue Information

=== Sub-task SPARK-46168 ===
Summary: Add axis parameter to DataFrame.idxmin & idxmax
Assignee: None
Status: Open
Affected: ["4.0.0"]


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