org.apache.hadoop.hive.ql.plan.UnionWork Maven / Gradle / Ivy
/**
* 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.hadoop.hive.ql.plan;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.HashSet;
import org.apache.hadoop.hive.ql.plan.BaseWork;
import org.apache.hadoop.hive.ql.plan.Explain.Level;
import org.apache.hadoop.hive.ql.exec.Operator;
import org.apache.hadoop.hive.ql.exec.UnionOperator;
import org.apache.hadoop.mapred.JobConf;
/**
* Simple wrapper for union all cases. All contributing work for a union all
* is collected here. Downstream work will connect to the union not the individual
* work.
*/
public class UnionWork extends BaseWork {
private final Set unionOperators = new HashSet();
public UnionWork() {
super();
}
public UnionWork(String name) {
super(name);
}
@Override
@Explain(displayName = "Vertex", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public String getName() {
return super.getName();
}
@Override
public void replaceRoots(Map, Operator> replacementMap) {
}
@Override
public Set> getAllRootOperators() {
return new HashSet>();
}
public void addUnionOperators(Collection unions) {
unionOperators.addAll(unions);
}
public Set getUnionOperators() {
return unionOperators;
}
public void configureJobConf(JobConf job) {
}
}