Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/18687
Thanks for fixing this, but this PR does not fix all the cases that caused
by our materialized plans in the QueryExecution. For examples,
```Scala
Seq("1", "2").toDF().write.saveAsTable("t")
val ds1 = spark.table("t")
val ds2 = spark.table("t")
ds1.collect()
ds2.persist()
ds1.collect() --> this still use the uncached plan.
```
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