wiedld commented on code in PR #17249:
URL: https://github.com/apache/datafusion/pull/17249#discussion_r2286502812


##########
datafusion/expr/src/utils.rs:
##########
@@ -1225,6 +1225,9 @@ pub fn only_or_err<T>(slice: &[T]) -> Result<&T> {
 }
 
 /// merge inputs schema into a single schema.
+///
+/// This function merges schemas from multiple logical plan inputs using 
[`DFSchema::merge`].
+/// Refer to that documentation for details on precedence and metadata 
handling.
 pub fn merge_schema(inputs: &[&LogicalPlan]) -> DFSchema {

Review Comment:
   This prefers us to the other docs:
   https://github.com/apache/datafusion/pull/17249/files#r2286497514



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