com.hazelcast.sql.impl.exec.EmptyExec Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.sql.impl.exec;
import com.hazelcast.sql.impl.row.EmptyRowBatch;
import com.hazelcast.sql.impl.row.RowBatch;
/**
* Scan over an empty result-set.
*/
public final class EmptyExec extends AbstractExec {
public EmptyExec(int id) {
super(id);
}
@Override
public IterationResult advance0() {
return IterationResult.FETCHED_DONE;
}
@Override
public RowBatch currentBatch0() {
return EmptyRowBatch.INSTANCE;
}
}