tustvold commented on code in PR #4962:
URL: https://github.com/apache/arrow-rs/pull/4962#discussion_r1368572935
##########
arrow-schema/src/fields.rs:
##########
@@ -83,6 +87,16 @@ impl Fields {
.zip(other.iter())
.all(|(a, b)| Arc::ptr_eq(a, b) || a.contains(b))
}
+
+ pub fn reverse(&mut self) {
+ let new_fields: Vec<FieldRef> = self.iter().rev().map(|f| f.clone() as
FieldRef).collect();
+ self.0 = Arc::new(new_fields);
+ }
+
+ pub fn push(&mut self, field: Field) {
Review Comment:
The proposal in this PR will add an additional pointer indirection to field
access, whilst still requiring atomics for every call to push.
I think the better question is, why not use SchemaBuilder, it will be
faster, less complicated, and avoid having to make changes to Fields?
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