/**
* 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 org.apache.hadoop.hive.ql.plan.Explain.Level;
/**
* unionDesc is a empty class currently. However, union has more than one input
* (as compared with forward), and therefore, we need a separate class.
**/
@Explain(displayName = "Union", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public class UnionDesc extends AbstractOperatorDesc {
private static final long serialVersionUID = 1L;
private transient int numInputs;
// If this UnionOperator is inside the reduce side of an MR job generated
// by Correlation Optimizer, which means all inputs of this UnionOperator are
// from DemuxOperator. If so, we should not touch this UnionOperator in genMapRedTasks.
private transient boolean allInputsInSameReducer;
@SuppressWarnings("nls")
public UnionDesc() {
numInputs = 2;
allInputsInSameReducer = false;
}
/**
* @return the numInputs
*/
public int getNumInputs() {
return numInputs;
}
/**
* @param numInputs
* the numInputs to set
*/
public void setNumInputs(int numInputs) {
this.numInputs = numInputs;
}
public boolean isAllInputsInSameReducer() {
return allInputsInSameReducer;
}
public void setAllInputsInSameReducer(boolean allInputsInSameReducer) {
this.allInputsInSameReducer = allInputsInSameReducer;
}
}