AngersZhuuuu commented on a change in pull request #26437: [SPARK-29800][SQL]
Plan Exists 's subquery in PlanSubqueries
URL: https://github.com/apache/spark/pull/26437#discussion_r344201008
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/subquery.scala
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@@ -194,6 +257,19 @@ case class PlanSubqueries(sparkSession: SparkSession)
extends Rule[SparkPlan] {
}
val executedPlan = new QueryExecution(sparkSession, query).executedPlan
InSubqueryExec(expr, SubqueryExec(s"subquery#${exprId.id}",
executedPlan), exprId)
+ case expressions.Exists(sub, children, exprId) =>
Review comment:
> We can think more about how to solve this problem in your original PR.
Try some ways, result is not the same as PostgresSQL.
Since for full outer join, we can't push down or build a new join.
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