Hi, Just came across the Expression trait [1] that can be check for determinism by the method deterministic [2] and trait Nondeterministic [3]. Why both?
[1] https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala#L53 [2] https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala#L80 [3] https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala#L271 Pozdrawiam, Jacek Laskowski ---- https://medium.com/@jaceklaskowski/ Mastering Apache Spark 2.0 http://bit.ly/mastering-apache-spark Follow me at https://twitter.com/jaceklaskowski --------------------------------------------------------------------- To unsubscribe e-mail: dev-unsubscr...@spark.apache.org
