Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/7417#discussion_r38608917
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/CartesianProduct.scala
---
@@ -27,16 +27,27 @@ import org.apache.spark.sql.execution.{BinaryNode,
SparkPlan}
* :: DeveloperApi ::
*/
@DeveloperApi
-case class CartesianProduct(left: SparkPlan, right: SparkPlan) extends
BinaryNode {
+case class CartesianProduct(
+ left: SparkPlan,
+ right: SparkPlan,
+ buildSide: BuildSide) extends BinaryNode {
override def output: Seq[Attribute] = left.output ++ right.output
+ private val (small, big) = buildSide match {
+ case BuildRight => (left, right)
--- End diff --
In other places, `BuildRight` means the right side is a small table, such
as `org.apache.spark.sql.execution.joins.HashJoin`, and we usually broadcast
it. Could you follow this semantics?
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