Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/22375#discussion_r223169695
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionEvalHelper.scala
---
@@ -221,6 +227,12 @@ trait ExpressionEvalHelper extends
GeneratorDrivenPropertyChecks with PlanTestBa
val unsafeRow = evaluateWithUnsafeProjection(expression, inputRow)
val input = if (inputRow == EmptyRow) "" else s", input: $inputRow"
+ val dataType = expression.dataType
+ if (!checkResult(unsafeRow.get(0, dataType), expected, dataType,
expression.nullable)) {
--- End diff --
We check different properties in these two `if` statements.
1. Line 231 checks consistency between value and `nullable` in `expected`
1. Line 245 checks bit-wise value between `expected` and `expression`
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