Github user marmbrus commented on a diff in the pull request: https://github.com/apache/spark/pull/5208#discussion_r28198810 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala --- @@ -144,6 +145,12 @@ private[sql] class SQLConf extends Serializable { getConf(AUTO_BROADCASTJOIN_THRESHOLD, (10 * 1024 * 1024).toString).toInt /** + * By default not choose sort merge join. --- End diff -- Explain what sort merge join is, and why you might want to turn it on.
--- 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