wangyum commented on a change in pull request #28626:
URL: https://github.com/apache/spark/pull/28626#discussion_r429753348
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/expressions/ExpressionInfoSuite.scala
##########
@@ -156,4 +158,74 @@ class ExpressionInfoSuite extends SparkFunSuite with
SharedSparkSession {
}
}
}
+
+ test("Check whether should extend NullIntolerant") {
+ // Only check expressions extended from these expressions
+ val parentExpressionNames = Seq(classOf[UnaryExpression],
classOf[BinaryExpression],
+ classOf[TernaryExpression], classOf[QuaternaryExpression],
+ classOf[SeptenaryExpression]).map(_.getName)
Review comment:
This checker only check the expressions extended from these
expressions(`UnaryExpression`, `BinaryExpression`, `TernaryExpression`,
`QuaternaryExpression` and `SeptenaryExpression`) because these expressions are
NullIntolerant by default.
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