yaooqinn commented on a change in pull request #32781:
URL: https://github.com/apache/spark/pull/32781#discussion_r647619551
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ShuffleExchangeExec.scala
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@@ -92,6 +92,11 @@ case object REPARTITION extends ShuffleOrigin
// a certain partition number. Spark can't optimize it.
case object REPARTITION_WITH_NUM extends ShuffleOrigin
+// Indicates that the shuffle operator was added by the user-specified
repartition operator.
+// Spark first tries to coalesce partitions, if it cannot be coalesced, then
try to use the
+// local shuffle reader.
+case object REPARTITION_WITHOUT_COL_AND_NUM extends ShuffleOrigin
Review comment:
or `REPARTITION` -> `REPARTITION_BY_NONE`
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