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• ColumnStatsAggregator.java

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org.apache.hudi.org.apache.hadoop_hive.metastore.hbase.stats.ColumnStatsAggregator 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.metastore.hbase.stats;

import java.util.List;

import org.apache.hadoop.hive.metastore.api.ColumnStatistics;
import org.apache.hadoop.hive.metastore.api.ColumnStatisticsObj;
import org.apache.hadoop.hive.metastore.api.MetaException;

public abstract class ColumnStatsAggregator {
  public int numBitVectors;
  public boolean useDensityFunctionForNDVEstimation;

  public abstract ColumnStatisticsObj aggregate(String colName, List partNames,
      List css) throws MetaException;
}