Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/5208#discussion_r28198853
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala ---
@@ -90,6 +90,13 @@ private[sql] abstract class SparkStrategies extends
QueryPlanner[SparkPlan] {
left.statistics.sizeInBytes <=
sqlContext.conf.autoBroadcastJoinThreshold =>
makeBroadcastHashJoin(leftKeys, rightKeys, left, right,
condition, joins.BuildLeft)
+ // for now let's support inner join first, then add outer join
--- End diff --
Lets explictly comment that we try SortMergeJoin first, but only if the
config is set.
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