Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/7116#discussion_r33607070
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala ---
@@ -1434,7 +1434,9 @@ class DataFrame private[sql](
}
}
- private[sql] def internalRowRdd = queryExecution.executedPlan.execute()
+ // Note that the RDD is memoized. Once called, it won't change even if
you change any
+ // query planning related Spark SQL configurations.
+ private[sql] def internalRowRdd = queryExecution.toRdd
--- End diff --
This patch change the behavior of `internalRowRdd `(as the comment says),
is this what we want?
If it's, I think making it `lazy val` will be more clear than the comment
says.
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