Github user maropu commented on the issue:
https://github.com/apache/spark/pull/17670
Looking around the related code, I think we cannot easily set
`defaultParallelism` inside `catalyst.plans.logical` because there is no
obvious way to access `SQLContext` there. So, IIUC, we cannot easily set the
value at `numSlice` in `ResolveTableValuedFunctions `. Another approach to
share the default Range `numSlice` of SparkContext APIs and SQL is that [we do
not set the default value in
`SparkSession`](https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/SparkSession.scala#L517)
and we set the default value in `RangeExec` for both cases. Thought?
@jaceklaskowski @gatorsmile
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