Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/22375#discussion_r216868299
--- 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
+ val expectedRow = UnsafeProjection.create(Array(dtAsNullable,
dtAsNullable)).apply(lit)
--- End diff --
Thank you for your comment. Do you think what test is preferable?
* Successfully pass (we already have these UTs since all UTs have been
passed)
* Expectedly failure (In other words, add a function that generated
incorrect result)
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