cloud-fan commented on a change in pull request #27750: [SPARK-30998][SQL] 
ClassCastException when a generator having nested inner generators
URL: https://github.com/apache/spark/pull/27750#discussion_r386211633
 
 

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 File path: 
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/analysis/TestRelations.scala
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 @@ -62,6 +62,9 @@ object TestRelations {
   val listRelation = LocalRelation(
     AttributeReference("list", ArrayType(IntegerType))())
 
+  val nestedListRelation = LocalRelation(
 
 Review comment:
   will this relation be used in more tests? if not let's inline it in your 
test case.
   
   Note that, the more common test relations we have, the harder to review test 
cases, as we need to search the definition of the used test relations.

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