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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.sql.execution.local
import org.apache.spark.broadcast.Broadcast
import org.apache.spark.sql.SQLConf
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.execution.joins.{BuildLeft, BuildRight, BuildSide, HashedRelation}
/**
* A [[HashJoinNode]] for broadcast join. It takes a streamedNode and a broadcast
* [[HashedRelation]]. The actual work of this node is defined in [[HashJoinNode]].
*/
case class BroadcastHashJoinNode(
conf: SQLConf,
streamedKeys: Seq[Expression],
streamedNode: LocalNode,
buildSide: BuildSide,
buildOutput: Seq[Attribute],
hashedRelation: Broadcast[HashedRelation])
extends UnaryLocalNode(conf) with HashJoinNode {
override val child = streamedNode
// Because we do not pass in the buildNode, we take the output of buildNode to
// create the inputSet properly.
override def inputSet: AttributeSet = AttributeSet(child.output ++ buildOutput)
override def output: Seq[Attribute] = buildSide match {
case BuildRight => streamedNode.output ++ buildOutput
case BuildLeft => buildOutput ++ streamedNode.output
}
protected override def doOpen(): Unit = {
streamedNode.open()
// Set the HashedRelation used by the HashJoinNode.
withHashedRelation(hashedRelation.value)
}
override def close(): Unit = {
streamedNode.close()
}
}
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