org.apache.hadoop.hive.ql.exec.vector.mapjoin.optimized.VectorMapJoinOptimizedHashMultiSet Maven / Gradle / Ivy
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* 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.optimized;
import java.io.IOException;
import org.apache.hadoop.hive.ql.exec.JoinUtil;
import org.apache.hadoop.hive.ql.exec.persistence.BytesBytesMultiHashMap;
import org.apache.hadoop.hive.ql.exec.persistence.MapJoinTableContainer;
import org.apache.hadoop.hive.ql.exec.persistence.MapJoinTableContainer.ReusableGetAdaptor;
import org.apache.hadoop.hive.ql.exec.vector.mapjoin.hashtable.VectorMapJoinBytesHashMultiSet;
import org.apache.hadoop.hive.ql.exec.vector.mapjoin.hashtable.VectorMapJoinHashMultiSetResult;
import org.apache.hadoop.hive.ql.exec.vector.mapjoin.hashtable.VectorMapJoinHashTableResult;
import org.apache.hadoop.hive.serde2.WriteBuffers.ByteSegmentRef;
public class VectorMapJoinOptimizedHashMultiSet
extends VectorMapJoinOptimizedHashTable
implements VectorMapJoinBytesHashMultiSet {
@Override
public VectorMapJoinHashMultiSetResult createHashMultiSetResult() {
return new HashMultiSetResult();
}
public static class HashMultiSetResult extends VectorMapJoinHashMultiSetResult {
private BytesBytesMultiHashMap.Result bytesBytesMultiHashMapResult;
private boolean haveCount;
public HashMultiSetResult() {
super();
bytesBytesMultiHashMapResult = new BytesBytesMultiHashMap.Result();
}
public BytesBytesMultiHashMap.Result bytesBytesMultiHashMapResult() {
return bytesBytesMultiHashMapResult;
}
/*
* @return The multi-set count for the lookup key.
*/
@Override
public long count() {
if (!haveCount) {
if (bytesBytesMultiHashMapResult.isSingleRow()) {
count = 1;
} else {
count = 0;
ByteSegmentRef byteSegmentRef = bytesBytesMultiHashMapResult.first();
while (byteSegmentRef != null) {
count++;
byteSegmentRef = bytesBytesMultiHashMapResult.next();
}
}
haveCount = true;
}
return count;
}
@Override
public void forget() {
haveCount = false;
bytesBytesMultiHashMapResult.forget();
super.forget();
}
}
@Override
public JoinUtil.JoinResult contains(byte[] keyBytes, int keyOffset, int keyLength,
VectorMapJoinHashMultiSetResult hashMultiSetResult) throws IOException {
HashMultiSetResult implementationHashMultiSetResult = (HashMultiSetResult) hashMultiSetResult;
JoinUtil.JoinResult joinResult =
doLookup(keyBytes, keyOffset, keyLength,
implementationHashMultiSetResult.bytesBytesMultiHashMapResult(),
(VectorMapJoinHashTableResult) hashMultiSetResult);
return joinResult;
}
public VectorMapJoinOptimizedHashMultiSet(
MapJoinTableContainer originalTableContainer, ReusableGetAdaptor hashMapRowGetter) {
super(originalTableContainer, hashMapRowGetter);
}
}