alamb commented on code in PR #8286:
URL: https://github.com/apache/arrow-datafusion/pull/8286#discussion_r1399586802
##########
datafusion/physical-plan/src/projection.rs:
##########
@@ -257,16 +257,12 @@ fn get_field_metadata(
e: &Arc<dyn PhysicalExpr>,
input_schema: &Schema,
) -> Option<HashMap<String, String>> {
- let name = if let Some(column) = e.as_any().downcast_ref::<Column>() {
- column.name()
- } else {
- return None;
- };
-
- input_schema
- .field_with_name(name)
- .ok()
- .map(|f| f.metadata().clone())
+ // Look up field by index in schema (not NAME)
+ e.as_any()
Review Comment:
This is the fix -- look up metadata by column index rather than name
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