Jefffrey commented on code in PR #10981:
URL: https://github.com/apache/arrow-rs/pull/10981#discussion_r3933317551


##########
arrow-string/src/concat_elements.rs:
##########
@@ -219,11 +219,17 @@ pub fn concat_elements_fixed_size_binary(
         ))
     })?;
     let output_size = left_size + right_size;
+    let output_value_length = i32::try_from(output_size).map_err(|_| {
+        ArrowError::InvalidArgumentError(format!(
+            "Concatenated FixedSizeBinary value length {output_size} exceeds 
{}",
+            i32::MAX

Review Comment:
   ```suggestion
               "Concatenated FixedSizeBinary value length exceeds i32",
   ```
   
   those big numbers arent really readable so not sure how useful they would be 
in the error



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