joins

Type Members

1. case class BroadcastHashJoin(leftKeys: Seq[Expression], rightKeys: Seq[Expression], buildSide: BuildSide, left: SparkPlan, right: SparkPlan) extends SparkPlan with BinaryNode with HashJoin with Product with Serializable

   Performs an inner hash join of two child relations.

2. case class BroadcastHashOuterJoin(leftKeys: Seq[Expression], rightKeys: Seq[Expression], joinType: JoinType, condition: Option[Expression], left: SparkPlan, right: SparkPlan) extends SparkPlan with BinaryNode with HashOuterJoin with Product with Serializable

   Performs a outer hash join for two child relations.

3. case class BroadcastLeftSemiJoinHash(leftKeys: Seq[Expression], rightKeys: Seq[Expression], left: SparkPlan, right: SparkPlan, condition: Option[Expression]) extends SparkPlan with BinaryNode with HashSemiJoin with Product with Serializable

   Build the right table's join keys into a HashSet, and iteratively go through the left table, to find the if join keys are in the Hash set.

4. case class BroadcastNestedLoopJoin(left: SparkPlan, right: SparkPlan, buildSide: BuildSide, joinType: JoinType, condition: Option[Expression]) extends SparkPlan with BinaryNode with Product with Serializable

5. sealed abstract class BuildSide extends AnyRef

6. case class CartesianProduct(left: SparkPlan, right: SparkPlan) extends SparkPlan with BinaryNode with Product with Serializable

7. trait HashJoin extends AnyRef

8. trait HashOuterJoin extends AnyRef

9. trait HashSemiJoin extends AnyRef

10. case class LeftSemiJoinBNL(streamed: SparkPlan, broadcast: SparkPlan, condition: Option[Expression]) extends SparkPlan with BinaryNode with Product with Serializable

    Using BroadcastNestedLoopJoin to calculate left semi join result when there's no join keys for hash join.

11. case class LeftSemiJoinHash(leftKeys: Seq[Expression], rightKeys: Seq[Expression], left: SparkPlan, right: SparkPlan, condition: Option[Expression]) extends SparkPlan with BinaryNode with HashSemiJoin with Product with Serializable

    Build the right table's join keys into a HashSet, and iteratively go through the left table, to find the if join keys are in the Hash set.

12. case class SortMergeJoin(leftKeys: Seq[Expression], rightKeys: Seq[Expression], left: SparkPlan, right: SparkPlan) extends SparkPlan with BinaryNode with Product with Serializable

    Performs an sort merge join of two child relations.

13. case class SortMergeOuterJoin(leftKeys: Seq[Expression], rightKeys: Seq[Expression], joinType: JoinType, condition: Option[Expression], left: SparkPlan, right: SparkPlan) extends SparkPlan with BinaryNode with Product with Serializable

    Performs an sort merge outer join of two child relations.