tobixdev commented on code in PR #8937:
URL: https://github.com/apache/arrow-rs/pull/8937#discussion_r2577663763
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arrow-schema/src/fields.rs:
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@@ -329,6 +329,28 @@ impl std::fmt::Debug for UnionFields {
}
}
+impl PartialEq for UnionFields {
Review Comment:
I think this is a possible way of getting the desired behavior. In our
project, we do have some mildly large unions (10-ish currently, but maybe more
in the future) that occur very frequently and I am a bit anxious on how the
quadratic equality check will perform in practice, as the equality of a data
type is often used when comparing fields, schemas, and logical plans.
Another approach would be sorting the slice when constructing the instance.
Maybe this would be an equally simple change with better performance as this
already a private field.
Note that I have no idea how this will actually perform as I have no
benchmarks. Just my 2 cents.
Otherwise, this looks like a good change!
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