cloud-fan commented on a change in pull request #26437: [SPARK-29800][SQL] Plan
non-correlated Exists 's subquery in PlanSubqueries
URL: https://github.com/apache/spark/pull/26437#discussion_r345289910
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/subquery.scala
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@@ -171,6 +173,57 @@ case class InSubqueryExec(
}
}
+/**
+ * The physical node of non-correlated EXISTS subquery.
+ */
+case class ExistsExec(
+ plan: BaseSubqueryExec,
+ exprId: ExprId)
+ extends ExecSubqueryExpression {
+
+ @transient private var result: Boolean = _
Review comment:
We should define the type as `Option[Boolean]`. The default value for
boolean is false, not null.
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