gortiz commented on code in PR #14296:
URL: https://github.com/apache/pinot/pull/14296#discussion_r1816145901
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pinot-query-planner/src/main/java/org/apache/pinot/query/planner/plannode/PlanNodeVisitor.java:
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@@ -63,4 +63,150 @@ public interface PlanNodeVisitor<T, C> {
T visitExchange(ExchangeNode exchangeNode, C context);
T visitExplained(ExplainedNode node, C context);
+
+ /**
Review Comment:
Because it is closely related to this visitor. Also I don't need to call it
`PlanNodeDepthFirstVisitor` given it is already contained inside
`PlanNodeVisitor`. But I'm open to move as a regular class if it is preferred.
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