Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/11403#discussion_r55442096
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlanInfo.scala ---
@@ -31,13 +32,26 @@ class SparkPlanInfo(
val simpleString: String,
val children: Seq[SparkPlanInfo],
val metadata: Map[String, String],
- val metrics: Seq[SQLMetricInfo])
+ val metrics: Seq[SQLMetricInfo]) {
+
+ override def hashCode(): Int = {
+ simpleString.hashCode
--- End diff --
We only need to make sure that those object equal with each other should
have the same hashCode, but the hashCode does not need to considering all the
members.
Using simpleString here should be enough to have good hashCode (be good
enough to distinguish each other within a plan)
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