cloud-fan commented on issue #25295: [SPARK-28560][SQL] Optimize shuffle reader to local shuffle reader when smj converted to bhj in adaptive execution URL: https://github.com/apache/spark/pull/25295#issuecomment-530375950 BTW, local shuffle reader doesn't need to cooperate with other shuffle nodes in the same shuffle stage. We can adjust the numPartitions of local shuffle reader freely. This can be a followup.
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