cloud-fan commented on a change in pull request #24258:
[SPARK-27279][SQL][FOLLOW-UP] Reuse subquery should compare child plan of
`SubqueryExec`
URL: https://github.com/apache/spark/pull/24258#discussion_r270735119
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/subquery.scala
##########
@@ -129,13 +134,14 @@ case class ReuseSubquery(conf: SQLConf) extends
Rule[SparkPlan] {
return plan
}
// Build a hash map using schema of subqueries to avoid O(N*N) sameResult
calls.
- val subqueries = mutable.HashMap[StructType, ArrayBuffer[SubqueryExec]]()
+ val subqueries = mutable.HashMap[StructType,
ArrayBuffer[BaseSubqueryExec]]()
plan transformAllExpressions {
case sub: ExecSubqueryExpression =>
- val sameSchema = subqueries.getOrElseUpdate(sub.plan.schema,
ArrayBuffer[SubqueryExec]())
+ val sameSchema =
+ subqueries.getOrElseUpdate(sub.plan.schema,
ArrayBuffer[BaseSubqueryExec]())
Review comment:
unnecessary change?
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