AngersZhuuuu 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_r344656433
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/subquery.scala
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@@ -194,6 +272,19 @@ case class PlanSubqueries(sparkSession: SparkSession)
extends Rule[SparkPlan] {
}
val executedPlan = new QueryExecution(sparkSession, query).executedPlan
InSubqueryExec(expr, SubqueryExec(s"subquery#${exprId.id}",
executedPlan), exprId)
+ case expressions.Exists(sub, children, exprId) =>
+ val expr = if (children.length == 1) {
+ children.head
+ } else {
+ CreateNamedStruct(
+ children.zipWithIndex.flatMap { case (v, index) =>
+ Seq(Literal(s"col_$index"), v)
+ }
+ )
+ }
+ val executedPlan = new QueryExecution(sparkSession, Project(Nil,
sub)).executedPlan
+ ExistsExec(expr, sub.treeString,
Review comment:
> Why `ExistsExec` needs a `expr` parameter?
Remove `expr` and `subQuery`
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