tustvold opened a new pull request, #2838:
URL: https://github.com/apache/arrow-rs/pull/2838
# Which issue does this PR close?
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Closes #1523
# Rationale for this change
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When implementing sorts, joins, etc... it is fairly common to need a method
to select values from multiple source arrays and interleave them into a single
output array.
I opted to call this `interleave` instead of `take_multi`, etc... as it has
a non-trivially different signature, I think serves a sufficiently different
use-case, and it isn't immediately obvious that the `multi` in `take_multi`
refers to multiple source arrays, and not something different.
# What changes are included in this PR?
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Adds an interleave kernel that allows interleaving values from multiple
source arrays. This is an MVP implementation, largely lifted from
SortPreservingMerge in DataFusion. Future PRs will look to optimise it
# Are there any user-facing changes?
No
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