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https://issues.apache.org/jira/browse/ARROW-15032?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17456021#comment-17456021
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Rok Mihevc commented on ARROW-15032:
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We have
[ISOCalendar|https://github.com/apache/arrow/blob/master/cpp/src/arrow/compute/kernels/scalar_temporal_unary.cc#L712]
kernel that does something similar to what you're suggesting. Given enough
interest we could add y/m/d kernel too.
> [C++] Compute Function to return Year / Month / Day
> ---------------------------------------------------
>
> Key: ARROW-15032
> URL: https://issues.apache.org/jira/browse/ARROW-15032
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Will Ayd
> Priority: Minor
> Labels: kernel
>
> Related to
> [https://stackoverflow.com/questions/70194714/how-to-return-a-structarray-from-multiple-scalar-functions/70213443#70213443]
>
> Right now the temporal compute functions include year / month / day as
> separate functions. AFAICT in the implementation these all internally create
> a struct containing year/month/day using the date library and then return
> only one of the components.
>
> From a pure efficiency perspective it might be best to just return all as one
> StructArray and allow the user to unpack the values. From a user perspective,
> I also typically want year / month / day to be bundled together, so one
> function call to get all three in one pass would be ideal
>
> This might be extendable down to the timestamp structure as well
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