Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3623#discussion_r112680743
  
    --- Diff: 
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/runtime/dataset/DataSetUserDefinedFunctionITCase.scala
 ---
    @@ -117,6 +117,187 @@ class DataSetUserDefinedFunctionITCase(
       }
     
       @Test
    +  def testDynamicSchema(): Unit = {
    --- End diff --
    
    Also, these are many integration tests which all run a full job. 
    Aren't `TableTestBase` sufficient to check if the plan is correctly 
translated? IMO, we should have only few integration tests and more unit tests 
based on `TableTestBase`.
    
    What do you think?


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