Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/22375#discussion_r219432959
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/ExpressionEvalHelperSuite.scala
---
@@ -35,6 +36,13 @@ class ExpressionEvalHelperSuite extends SparkFunSuite
with ExpressionEvalHelper
val e = intercept[RuntimeException] {
checkEvaluation(BadCodegenExpression(), 10) }
assert(e.getMessage.contains("some_variable"))
}
+
+ test("SPARK-25388: checkEvaluation should fail if nullable in DataType
is incorrect") {
+ val e = intercept[RuntimeException] {
+ checkEvaluation(MapIncorrectDataTypeExpression(), Map(3 -> 7, 6 ->
null))
--- End diff --
Even if we make it checking recursively, I think that this case cannot be
detected. This is because the mismatch occurs in the different recursive path.
Would it be possible to share the case where we distingished a wrong output
from a bad written UT in other places, as you proposed?
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