Github user mn-mikke commented on a diff in the pull request: https://github.com/apache/spark/pull/21236#discussion_r207148777 --- Diff: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionEvalHelper.scala --- @@ -98,6 +98,9 @@ trait ExpressionEvalHelper extends GeneratorDrivenPropertyChecks { if (expected.isNaN) result.isNaN else expected == result case (result: Float, expected: Float) => if (expected.isNaN) result.isNaN else expected == result + case (result: UnsafeRow, expected: GenericInternalRow) => --- End diff -- Hi @srowen, ```(InternalRow, InternalRow)``` case was introduced later in [21838](https://github.com/apache/spark/pull/21838) and covers the logic of the case with ```UnsafeRow```. So we can just remove the unreachable piece of code.
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