cloud-fan commented on a change in pull request #28540:
URL: https://github.com/apache/spark/pull/28540#discussion_r429927305
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/joins.scala
##########
@@ -208,3 +208,161 @@ object ExtractPythonUDFFromJoinCondition extends
Rule[LogicalPlan] with Predicat
}
}
}
+
+sealed abstract class BuildSide
+
+case object BuildRight extends BuildSide
+
+case object BuildLeft extends BuildSide
+
+trait JoinSelectionHelper {
+
+ def getBroadcastBuildSide(
+ left: LogicalPlan,
+ right: LogicalPlan,
+ joinType: JoinType,
+ hint: JoinHint,
+ onlyLookingAtHint: Boolean,
Review comment:
If we want to be super clear, maybe "pickJoinSideByHintOnly"? or simply
"hintOnly".
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