tustvold commented on code in PR #3187:
URL: https://github.com/apache/arrow-rs/pull/3187#discussion_r1031807817
##########
arrow/src/array/ord.rs:
##########
@@ -303,6 +303,26 @@ pub fn build_compare(left: &dyn Array, right: &dyn Array)
-> Result<DynComparato
Box::new(move |i, j| left.value(i).cmp(right.value(j)))
}
+ (Struct(f), Struct(_)) => {
+ let left = as_struct_array(left);
+ let right = as_struct_array(right);
+
+ let comparators = (0..f.len())
+ .map(|idx| {
+ build_compare(left.column(idx).as_ref(),
right.column(idx).as_ref())
+ })
+ .collect::<Result<Vec<_>>>()?;
+
+ Box::new(move |i, j| {
+ for c in &comparators {
+ match c(i, j) {
Review Comment:
The performance will not be spectacular, but as mentioned on #3185
performant comparisons should be performed using the row format - this is
mainly for completeness
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