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[C++][Compute] Add a pivot function #45269

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pitrou opened this issue Jan 15, 2025 · 1 comment
Open

[C++][Compute] Add a pivot function #45269

pitrou opened this issue Jan 15, 2025 · 1 comment
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Component: C++ Type: enhancement

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pitrou commented Jan 15, 2025

Describe the enhancement requested

To support pivot or ("pivot wider") functionality such as in Pandas, we could add a dedicated hash-aggregate function returning a StructArray.

We might also add a normal aggregate function (which would return a StructScalar).

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@pitrou pitrou mentioned this issue Jan 15, 2025
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@pitrou pitrou self-assigned this Jan 15, 2025
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pitrou commented Jan 15, 2025

Implementing this will be made easier by the "scatter" function proposed in #44393

pitrou added a commit to pitrou/arrow that referenced this issue Jan 15, 2025
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apacheGH-45269: [C++][Compute] Add pivot function
2a2f0b2
pitrou added a commit to pitrou/arrow that referenced this issue Jan 15, 2025
@pitrou
apacheGH-45269: [C++][Compute] Add pivot function
be0fac6
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