mqy commented on a change in pull request #9122:
URL: https://github.com/apache/arrow/pull/9122#discussion_r553462414
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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:
It is not acceptable if we silently append/ignore/replace duplicate
fields. Even if we can managed to let user to configure this `global` behavior,
it may not satisfy all possible duplications even in a single file: some one
want to append but another want to ignore. So, at present before we can find
the solution to let user define the behavior, I suggest raising error on
duplication.
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