tustvold opened a new pull request, #7855:
URL: https://github.com/apache/arrow-datafusion/pull/7855
## Which issue does this PR close?
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Closes #.
## Rationale for this change
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https://github.com/apache/arrow-datafusion/pull/7798 proposed making the
cursors themselves sliceable, this resulted in a potentially surprising
interface where slicing a cursor would reset its position. This is necessary
because a cascading merge sort needs to re-visit rows from previous passes.
Instead of introducing a notion of cursor slicing, this PR instead separates
the cursor out from the cursor's values. This in turn will allow constructing
cursors multiple times on the same set of values, and potentially adding the
ability to slice said values. I think this will be easier to follow.
## What changes are included in this PR?
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## Are these changes tested?
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## Are there any user-facing changes?
No, all of these details are crate private
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