arrow-ord: add support for nested types to partition
#7131
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cc @tustvold since it seems like you've worked in this code recently |
alamb
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Feb 15, 2025
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Thank you @asubiotto -- this looks great to me.
I think it just needs one more test and it would be good to merge
arrow-ord/src/partition.rs
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I wonder if using eq would be faster 🤔
https://docs.rs/arrow/latest/arrow/compute/kernels/cmp/fn.eq.html
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Do you mean for non-nested types? eq doesn't support nested types similarly to distinct and given they both shell out to compare_op I don't think there should be much of a perf difference between distinct and eq + mapping nulls to booleans (which would be necessary).
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partition
This support is currently incorrectly assumed by `BoundedWindowAggExec`, so partitioning on a nested type (e.g. struct) causes a nested comparison failure on execution. This commit adds a check to use distinct on non-nested types and falls back to using make_comparator on nested types.
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This support is currently incorrectly assumed by
BoundedWindowAggExec, so partitioning on a nested type (e.g. struct) causes a nested comparison failure on execution.This commit adds a check to use distinct on non-nested types and falls back to using make_comparator on nested types.
Which issue does this PR close?
Rationale for this change
Please see #7130 for more in depth explanation and alternatives considered.
What changes are included in this PR?
If statement to use the old path on non-nested types and a fallback path to use
make_comparatorto check for value distinctness.Are there any user-facing changes?
Previously failing use cases are now supported.