org.apache.hadoop.hive.ql.exec.vector.mapjoin.hashtable.VectorMapJoinBytesHashMap 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.ql.exec.vector.mapjoin.hashtable;
import java.io.IOException;
import org.apache.hadoop.hive.ql.exec.JoinUtil;
/*
* The interface for a single byte array key hash map lookup method.
*/
public interface VectorMapJoinBytesHashMap
extends VectorMapJoinBytesHashTable, VectorMapJoinHashMap {
/*
* Lookup a byte array key in the hash map.
*
* @param keyBytes
* A byte array containing the key within a range.
* @param keyStart
* The offset the beginning of the key.
* @param keyLength
* The length of the key.
* @param hashMapResult
* The object to receive small table value(s) information on a MATCH.
* Or, for SPILL, it has information on where to spill the big table row.
*
* @return
* Whether the lookup was a match, no match, or spill (the partition with the key
* is currently spilled).
*/
JoinUtil.JoinResult lookup(byte[] keyBytes, int keyStart, int keyLength,
VectorMapJoinHashMapResult hashMapResult) throws IOException;
}