com.hazelcast.sql.impl.calcite.opt.physical.exchange.AbstractExchangePhysicalRel 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.calcite.opt.physical.exchange;
import com.hazelcast.sql.impl.calcite.opt.physical.PhysicalRel;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.SingleRel;
/**
* Base class for exchanges.
*/
public abstract class AbstractExchangePhysicalRel extends SingleRel implements PhysicalRel {
public AbstractExchangePhysicalRel(RelOptCluster cluster, RelTraitSet traits, RelNode input) {
super(cluster, traits, input);
assert getMemberCount() > 1 : "Exchange should not be instantiated on single-member topology.";
}
}
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