Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/19714#discussion_r153864221
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkStrategies.scala ---
@@ -203,12 +240,7 @@ abstract class SparkStrategies extends
QueryPlanner[SparkPlan] {
joins.CartesianProductExec(planLater(left), planLater(right),
condition) :: Nil
case logical.Join(left, right, joinType, condition) =>
- val buildSide =
- if (right.stats.sizeInBytes <= left.stats.sizeInBytes) {
- BuildRight
- } else {
- BuildLeft
- }
+ val buildSide = broadcastSide(true, true, left, right)
--- End diff --
`canBuildLeft = true, canBuildRight = true`
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