Github user kiszk commented on a diff in the pull request: https://github.com/apache/spark/pull/22375#discussion_r216868343 --- Diff: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionEvalHelper.scala --- @@ -223,8 +223,8 @@ trait ExpressionEvalHelper extends GeneratorDrivenPropertyChecks with PlanTestBa } } else { val lit = InternalRow(expected, expected) - val expectedRow = - UnsafeProjection.create(Array(expression.dataType, expression.dataType)).apply(lit) + val dtAsNullable = expression.dataType.asNullable --- End diff -- Sure, add some comments from the description
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