[GitHub] [arrow] jorgecarleitao commented on a change in pull request #8076: ARROW-9885: [Rust][DataFusion] Minor code simplification

[GitBox <gi...@apache.org>]

jorgecarleitao commented on a change in pull request #8076:
URL: https://github.com/apache/arrow/pull/8076#discussion_r480820539



##########
File path: rust/datafusion/src/execution/physical_plan/expressions.rs
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@@ -991,48 +991,36 @@ impl fmt::Display for BinaryExpr {
     }
 }
 
-// Returns a formatted error about being impossible to coerce types for the binary operator.
-fn coercion_error<T>(
-    lhs_type: &DataType,
-    op: &Operator,
-    rhs_type: &DataType,
-) -> Result<T> {
+// Returns a formatted error about being impossible to coerce types to a common type
+fn coercion_error<T>(lhs_type: &DataType, rhs_type: &DataType) -> Result<T> {
     Err(ExecutionError::General(
         format!(
-            "The binary operator '{}' can't evaluate with lhs = '{:?}' and rhs = '{:?}'",

Review comment:
       I also agree. I've added a test to the error message to contain the operator, and made code pass the test.




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