comphead commented on code in PR #9104:
URL: https://github.com/apache/arrow-datafusion/pull/9104#discussion_r1476915870
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datafusion/common/src/dfschema.rs:
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@@ -112,6 +112,10 @@ pub struct DFSchema {
metadata: HashMap<String, String>,
/// Stores functional dependencies in the schema.
functional_dependencies: FunctionalDependencies,
+ /// Fields map
+ /// key - fully qualified field name
+ /// value - field index in schema
+ fields_map: BTreeMap<String, usize>,
Review Comment:
Name is also a String? should this also cause a copy?
Btw why it causes copy in the first place?
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