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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