cloud-fan commented on code in PR #40385:
URL: https://github.com/apache/spark/pull/40385#discussion_r1143136328
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sql/core/src/test/scala/org/apache/spark/sql/ExplainSuite.scala:
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@@ -771,6 +775,163 @@ class ExplainSuiteAE extends ExplainSuiteHelper with
EnableAdaptiveExecutionSuit
FormattedMode,
statistics)
}
+
+ test("SPARK-42753: Process subtree for ReusedExchange with unknown child") {
+ // Simulate a simplified subtree with a ReusedExchange pointing to an
Exchange node that has
+ // no ID. This is a rare edge cases that could arise during AQE if there
are multiple
+ // ReusedExchanges. We check to make sure the child Exchange gets an ID
and gets printed
+ val exchange = ShuffleExchangeExec(UnknownPartitioning(10),
+ RangeExec(org.apache.spark.sql.catalyst.plans.logical.Range(0, 1000, 1,
10)))
+ val reused = ReusedExchangeExec(Seq.empty, exchange)
Review Comment:
let's create valid plans for good hygiene. The shuffle partitioning can't be
`UnknownPartitioning`, we can use `RoundRobinPartitioning`. The
`ReusedExchangeExec` should have outout, we can use `exchange.output`
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