davidradl commented on code in PR #26278:
URL: https://github.com/apache/flink/pull/26278#discussion_r1986262779


##########
flink-core/src/main/java/org/apache/flink/api/java/typeutils/TypeExtractor.java:
##########
@@ -1340,16 +1340,15 @@ private <IN1, IN2, OUT> TypeInformation<OUT> 
createTypeInfoFromFactory(
             List<Type> typeHierarchy,
             TypeInformation<IN1> in1Type,
             TypeInformation<IN2> in2Type) {
-
-        final List<Type> factoryHierarchy = new ArrayList<>(typeHierarchy);
-        final TypeInfoFactory<? super OUT> factory = 
getClosestFactory(factoryHierarchy, t);
+        final List<Type> newTypeHierarchy = new ArrayList<>(typeHierarchy);

Review Comment:
   nit: it is not a hierarchy it is a list - if we are changing this why not 
change to something more representative like `candidateTypeList` and rename the 
related variables to be Lists not hierarchy.
   



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