/**
* 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.exec.vector.mapjoin.fast;
import java.io.IOException;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.io.BytesWritable;
/*
* An single STRING key hash map optimized for vector map join.
*
* The key will be deserialized and just the bytes will be stored.
*/
public class VectorMapJoinFastStringHashMap extends VectorMapJoinFastBytesHashMap {
private VectorMapJoinFastStringCommon stringCommon;
@Override
public void putRow(BytesWritable currentKey, BytesWritable currentValue) throws HiveException, IOException {
stringCommon.adaptPutRow(this, currentKey, currentValue);
}
public VectorMapJoinFastStringHashMap(
boolean isOuterJoin,
int initialCapacity, float loadFactor, int writeBuffersSize, long estimatedKeyCount) {
super(initialCapacity, loadFactor, writeBuffersSize, estimatedKeyCount);
stringCommon = new VectorMapJoinFastStringCommon(isOuterJoin);
}
@Override
public long getEstimatedMemorySize() {
long size = 0;
// adding 16KB constant memory for stringCommon as the rabit hole is deep to implement
// MemoryEstimate interface, also it is constant overhead
size += (16 * 1024L);
return super.getEstimatedMemorySize() + size;
}
}