Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/18930#discussion_r132846456 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala --- @@ -361,10 +361,18 @@ case class JsonTuple(children: Seq[Expression]) // the fields to query are the remaining children @transient private lazy val fieldExpressions: Seq[Expression] = children.tail + // a field name given with constant null will be replaced with this pseudo field name + private val nullFieldName = "__NullFieldName" --- End diff -- @jmchung, could we maybe compute this foldable related optimization ahead - https://github.com/jmchung/spark/blob/ffa575a6731fef3e0731b73e0f7311cb024e831b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/jsonExpressions.scala#L425-L439 and remove this fake field name? I think we can make a function for the above codes first and then use it for computation for each row. Did I understand correctly? I tried a rough version I thought - https://github.com/jmchung/spark/compare/SPARK-21677...HyukjinKwon:tmp-18930?expand=1, @viirya what do you think about this?
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org