emilk commented on code in PR #10661:
URL: https://github.com/apache/arrow-rs/pull/10661#discussion_r3773139588
##########
arrow-array/src/array/run_array.rs:
##########
@@ -206,6 +206,22 @@ impl<R: RunEndIndexType> RunArray<R> {
(self.data_type, self.run_ends, self.values)
}
+ /// The field that describes the run ends of this array.
+ pub fn run_ends_field(&self) -> &FieldRef {
+ match &self.data_type {
+ DataType::RunEndEncoded(f, _) => f,
+ _ => unreachable!(),
+ }
+ }
Review Comment:
The benefit of having two functions is that we have _names_ for each of the
fields, instead of relying on docs explaining which order they are returned in.
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