com.hazelcast.sql.impl.exec.EmptyExec Maven / Gradle / Ivy

/*
 * Copyright (c) 2008-2020, 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;
    }
}