LakeShen commented on code in PR #3393:
URL: https://github.com/apache/calcite/pull/3393#discussion_r1340867357
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core/src/main/java/org/apache/calcite/sql2rel/SqlToRelConverter.java:
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@@ -281,6 +283,9 @@ public class SqlToRelConverter {
*/
private final Deque<String> datasetStack = new ArrayDeque<>();
+ /** Stack of currently processed operators. */
Review Comment:
This code comment could be more detailed,you could give a code comment as to
why this stack is there,it is better to help others understand.
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