doki23 commented on code in PR #45181:
URL: https://github.com/apache/spark/pull/45181#discussion_r1536383716
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sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala:
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@@ -369,6 +375,20 @@ class QueryExecution(
Utils.redact(sparkSession.sessionState.conf.stringRedactionPattern,
message)
}
+ /**
+ * This method performs a pre-order traversal and return a boolean Array
+ * representing whether some nodes of the logical tree are persisted.
+ */
+ def computeCacheStateSignature(): Array[Boolean] = {
Review Comment:
It seems that scala's `BitSet` doesn't record the last index so that I can't
judge the num of fragments.
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