nevi-me commented on a change in pull request #9122:
URL: https://github.com/apache/arrow/pull/9122#discussion_r553319209



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File path: rust/arrow/src/array/array_struct.rs
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@@ -69,6 +69,9 @@ impl StructArray {
     }
 
     /// Return child array whose field name equals to column_name
+    ///
+    /// Note: The Arrow specification allows for duplicate field names, and in 
such

Review comment:
       There's a duplicate_field_name test, which fails because we always get 
the first named field, perhaps it hasn't been codified into the spec. I'll 
check.




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