Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/6413#discussion_r31193985
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/PlannerSuite.scala ---
@@ -32,6 +32,26 @@ import org.apache.spark.sql.types._
class PlannerSuite extends FunSuite {
+ test("multiway full outer join") {
+ val planned = testData
+ .join(testData2, testData("key") === testData2("a"),
"outer")
+ .join(testData3, testData("key") === testData3("a"),
"outer")
+ .queryExecution.executedPlan
+ val exchanges = planned.collect { case n: Exchange => n }
+
+ assert(exchanges.size === 3)
--- End diff --
This requires some further change I think, @yhuai should have some idea on
this.
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