Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/16826#discussion_r102618012
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SparkSession.scala
---
@@ -212,6 +219,29 @@ class SparkSession private(
new SparkSession(sparkContext, Some(sharedState))
}
+ /**
+ * :: Experimental ::
+ * Create an identical copy of this `SparkSession`, sharing the
underlying `SparkContext`
+ * and cached data. All the state of this session (i.e. SQL
configurations, temporary tables,
+ * registered functions) is also copied over.
--- End diff --
is ~also~ copied over.
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