andygrove commented on code in PR #2690:
URL: https://github.com/apache/arrow-datafusion/pull/2690#discussion_r889615100
##########
datafusion/expr/src/logical_plan/plan.rs:
##########
@@ -656,10 +656,22 @@ impl LogicalPlan {
ref limit,
..
}) => {
+ let projected_fields = match projection {
+ Some(indices) => {
+ let schema = source.schema();
+ let names: Vec<&str> = indices
+ .iter()
+ .map(|i| schema.field(*i).name().as_str())
+ .collect();
+ format!("Some([{}])", names.join(", "))
Review Comment:
I started out doing that and it broke many tests that were expecting `None`
so I decided to reduce the size of the change. I agree that it would be a nice
improvement though. I'm happy to work on that as a follow-on PR.
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