kosiew commented on code in PR #19955:
URL: https://github.com/apache/datafusion/pull/19955#discussion_r2729985918
##########
datafusion/common/src/nested_struct.rs:
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@@ -323,7 +306,11 @@ fn validate_field_compatibility(
Ok(())
}
-fn has_one_of_more_common_fields(
+/// Check if two field lists have at least one common field by name.
+///
+/// This is useful for validating struct compatibility when casting between
structs,
+/// ensuring that source and target fields have overlapping names.
+pub fn has_one_of_more_common_fields(
Review Comment:
This function is re-used at
https://github.com/kosiew/datafusion/blob/f078129e90a3d7c68bfec0d79ea94c205ddfab92/datafusion/optimizer/src/simplify_expressions/expr_simplifier.rs#L662
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