/**
* 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.metastore.hbase.stats.merge;
import org.apache.hadoop.hive.metastore.NumDistinctValueEstimator;
import org.apache.hadoop.hive.metastore.api.ColumnStatisticsObj;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class ColumnStatsMerger {
protected final Logger LOG = LoggerFactory.getLogger(ColumnStatsMerger.class.getName());
NumDistinctValueEstimator ndvEstimator = null;
public abstract void merge(ColumnStatisticsObj aggregateColStats,
ColumnStatisticsObj newColStats);
}