Github user davies commented on a diff in the pull request: https://github.com/apache/spark/pull/11403#discussion_r55448590 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameSuite.scala --- @@ -1318,6 +1318,34 @@ class DataFrameSuite extends QueryTest with SharedSQLContext { } + test("reuse exchange") { + withSQLConf("spark.sql.autoBroadcastJoinThreshold" -> "2") { + val df = sqlContext.range(100) + val join = df.join(df, "id") + val plan = join.queryExecution.executedPlan + checkAnswer(join, df) + assert( + join.queryExecution.executedPlan.collect { case e: ShuffleExchange => true }.size === 1) + assert(join.queryExecution.executedPlan.collect { case e: ReusedExchange => true }.size === 1) + val broadcasted = broadcast(join) + val join2 = join.join(broadcasted, "id").join(broadcasted, "id") + checkAnswer(join2, df) + assert( + join2.queryExecution.executedPlan.collect { case e: ShuffleExchange => true }.size === 1) + assert( + join2.queryExecution.executedPlan.collect { case e: BroadcastExchange => true }.size === 1) + assert( + join2.queryExecution.executedPlan.collect { case e: ReusedExchange => true }.size === 4) + } + } + + test("same result on aggregate") { --- End diff -- Added comment
--- 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