/**
* 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.parse;
import java.io.Serializable;
import org.apache.hadoop.hive.ql.plan.Explain;
/**
*
* This class stores all the information specified in the TABLESAMPLE(PERCENT ...) clause.
* e.g. for the clause "FROM t TABLESAMPLE(1 PERCENT) it will store the percentage 1,
* and the seed number is to determine which 1%. Currently it is from the conf
* hive.sample.seednumber
*
*/
public class SplitSample implements Serializable{
private static final long serialVersionUID = 1L;
/**
* The percentage of the TABLESAMPLE clause.
*/
private double percent;
/**
* The number used to determine which part of the input to sample
*/
private int seedNum = 0;
public SplitSample() {
}
public SplitSample(double percent, int seedNum) {
this.percent = percent;
this.seedNum = seedNum;
}
@Explain(displayName = "percentage")
public double getPercent() {
return percent;
}
public void setPercent(double percent) {
this.percent = percent;
}
@Explain(displayName = "seed number")
public int getSeedNum() {
return seedNum;
}
public void setSeedNum(int seedNum) {
this.seedNum = seedNum;
}
}