viirya commented on a change in pull request #35543:
URL: https://github.com/apache/spark/pull/35543#discussion_r808792856
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/constraintExpressions.scala
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@@ -30,6 +30,17 @@ trait TaggingExpression extends UnaryExpression {
override def eval(input: InternalRow): Any = child.eval(input)
}
+case class KnownNullable(child: Expression) extends TaggingExpression {
+ override def nullable: Boolean = true
+
+ override protected def doGenCode(ctx: CodegenContext, ev: ExprCode):
ExprCode = {
+ child.genCode(ctx)
Review comment:
`child.genCode(ctx).copy(isNull = TrueLiteral)`?
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