rui-mo commented on code in PR #5014:
URL: https://github.com/apache/incubator-gluten/pull/5014#discussion_r1531417665


##########
gluten-core/src/main/scala/io/glutenproject/backendsapi/SparkPlanExecApi.scala:
##########
@@ -199,6 +199,10 @@ trait SparkPlanExecApi {
     throw new UnsupportedOperationException("NaNvl is not supported")
   }
 
+  def genUuidTransformer(substraitExprName: String, original: Uuid): 
ExpressionTransformer = {
+    GenericExpressionTransformer(substraitExprName, Seq(), original)

Review Comment:
   Could you remind me why we distinguish the implementations of Velox and CH 
backend?



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