cloud-fan commented on code in PR #40385:
URL: https://github.com/apache/spark/pull/40385#discussion_r1141963547
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sql/core/src/main/scala/org/apache/spark/sql/execution/ExplainUtils.scala:
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@@ -119,17 +155,40 @@ object ExplainUtils extends AdaptiveSparkPlanHelper {
* @param plan Input query plan to process
* @param startOperatorID The start value of operation id. The subsequent
operations will be
* assigned higher value.
+ * @param visited A unique set of operators visited by generateOperatorIds.
The set is scoped
+ * at the callsite function processPlan. It serves two
purpose: Firstly, it is
+ * used to avoid accidentally overwriting existing IDs that
were generated in
+ * the same processPlan call. Secondly, it is used to allow
for intentional ID
+ * overwriting as part of SPARK-42753 where an Adaptively
Optimized Out Exchange
+ * and its subtree may contain IDs that were generated in a
previous AQE
+ * iteration's processPlan call which would result in
incorrect IDs.
+ * @param reusedExchanges A unique set of ReusedExchange nodes visited which
will be used to
+ * idenitfy adaptively optimized out exchanges in
SPARK-42753.
+ * @param addReusedExchanges Whether to add ReusedExchange nodes to
reusedExchanges set. We set it
+ * to false to avoid processing more nested
ReusedExchanges nodes in the
+ * subtree of an Adpatively Optimized Out Exchange.
* @return The last generated operation id for this input plan. This is to
ensure we always
* assign incrementing unique id to each operator.
*/
- private def generateOperatorIDs(plan: QueryPlan[_], startOperatorID: Int):
Int = {
+ private def generateOperatorIDs(
+ plan: QueryPlan[_],
+ startOperatorID: Int,
+ visited: Set[QueryPlan[_]],
+ reusedExchanges: ArrayBuffer[ReusedExchangeExec],
+ addReusedExchanges: Boolean): Int = {
var currentOperationID = startOperatorID
// Skip the subqueries as they are not printed as part of main query block.
if (plan.isInstanceOf[BaseSubqueryExec]) {
return currentOperationID
}
- def setOpId(plan: QueryPlan[_]): Unit = if
(plan.getTagValue(QueryPlan.OP_ID_TAG).isEmpty) {
Review Comment:
we don't need `QueryPlan.OP_ID_TAG` anymore?
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