Jiabao-Sun commented on code in PR #23358:
URL: https://github.com/apache/flink/pull/23358#discussion_r1319988195


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flink-table/flink-table-planner/src/test/scala/org/apache/flink/table/planner/expressions/utils/ExpressionTestBase.scala:
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@@ -329,9 +317,7 @@ abstract class ExpressionTestBase(isStreaming: Boolean = 
true) {
     val optimized = hep.findBestExp()
 
     // throw exception if plan contains more than a calc
-    if (!optimized.getInput(0).getInputs.isEmpty) {
-      fail("Expression is converted into more than a Calc operation. Use a 
different test method.")

Review Comment:
   Fixed



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