wangyum commented on pull request #29120:
URL: https://github.com/apache/spark/pull/29120#issuecomment-846507897
This change will introduce an additional shuffle. We can use
`localCheckpoint` to workaround this issue:
```scala
spark.range(100).createTempView("t1")
spark.range(200).createTempView("t2")
spark.sql("set spark.sql.autoBroadcastJoinThreshold=0")
spark.sql("select t1.* from t1 join t2 on (t1.id =
t2.id)").localCheckpoint().coalesce(1).show()
```
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