org.apache.hadoop.hive.ql.HashTableLoaderFactory 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
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*/
package org.apache.hadoop.hive.ql;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.ql.exec.HashTableLoader;
/**
* HashTableLoaderFactory is used to determine the strategy
* of loading the hashtables for the MapJoinOperator
*/
public class HashTableLoaderFactory {
private HashTableLoaderFactory() {
}
public static HashTableLoader getLoader(Configuration hconf) {
if (HiveConf.getVar(hconf, ConfVars.HIVE_EXECUTION_ENGINE).equals("tez")) {
return new org.apache.hadoop.hive.ql.exec.tez.HashTableLoader();
} else {
return new org.apache.hadoop.hive.ql.exec.mr.HashTableLoader();
}
}
}