jchen5 commented on code in PR #41094:
URL: https://github.com/apache/spark/pull/41094#discussion_r1188621808
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/subquery.scala:
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@@ -367,7 +367,7 @@ case class ListQuery(
plan.output.head.dataType
}
override lazy val resolved: Boolean = childrenResolved && plan.resolved &&
numCols != -1
- override def nullable: Boolean = false
+ override def nullable: Boolean = childOutputs.exists(_.nullable)
Review Comment:
InSubquery.nullable derives from the nullability of its children, which are
the values (lhs) and ListQuery (rhs). Fixing ListQuery.nullable therefore fixes
InSubquery.nullable and fixes the behavior in the unit test I added.
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