/**
* 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.drill.exec.physical.impl.join;
import java.util.List;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.physical.config.MergeJoinPOP;
import org.apache.drill.exec.physical.impl.BatchCreator;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.calcite.rel.core.JoinRelType;
import com.google.common.base.Preconditions;
public class MergeJoinCreator implements BatchCreator<MergeJoinPOP> {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(MergeJoinCreator.class);
@Override
public MergeJoinBatch getBatch(FragmentContext context, MergeJoinPOP config, List<RecordBatch> children)
throws ExecutionSetupException {
Preconditions.checkArgument(children.size() == 2);
if(config.getJoinType() == JoinRelType.RIGHT){
return new MergeJoinBatch(config.flipIfRight(), context, children.get(1), children.get(0));
}else{
return new MergeJoinBatch(config, context, children.get(0), children.get(1));
}
}
}