org.apache.hadoop.hive.ql.io.StatsProvidingRecordReader 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hive.ql.io;
import org.apache.hadoop.hive.serde2.SerDeStats;
/**
* If a file format internally gathers statistics (like ORC) then it can expose
* the statistics through this interface. Reader side statistics are useful for
* updating the metastore with table/partition level statistics using analyze
* command.
* StatsProvidingRecordReader.
*/
public interface StatsProvidingRecordReader {
/**
* Returns the statistics information
* @return SerDeStats
*/
SerDeStats getStats();
}