org.apache.hadoop.hive.ql.plan.DummyStoreDesc 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.plan;
import org.apache.hadoop.hive.ql.plan.Explain.Level;
/**
* Dummy Store Desc. This is only used by sort-merge joins to store the
* result for the small table (sub-query) being scanned.
*/
@Explain(displayName = "Dummy Store", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public class DummyStoreDesc extends AbstractOperatorDesc {
private static final long serialVersionUID = 1L;
public DummyStoreDesc() {
}
@Override
public DummyStoreDesc clone() {
return new DummyStoreDesc();
}
}