com.hazelcast.org.apache.calcite.rel.logical.LogicalExchange Maven / Gradle / Ivy
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
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package com.hazelcast.org.apache.calcite.rel.logical;
import com.hazelcast.org.apache.calcite.plan.Convention;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelDistribution;
import com.hazelcast.org.apache.calcite.rel.RelDistributionTraitDef;
import com.hazelcast.org.apache.calcite.rel.RelInput;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.RelShuttle;
import com.hazelcast.org.apache.calcite.rel.core.Exchange;
/**
* Sub-class of {@link Exchange} not
* targeted at any particular engine or calling convention.
*/
public final class LogicalExchange extends Exchange {
private LogicalExchange(RelOptCluster cluster, RelTraitSet traitSet,
RelNode input, RelDistribution distribution) {
super(cluster, traitSet, input, distribution);
assert traitSet.containsIfApplicable(Convention.NONE);
}
/**
* Creates a LogicalExchange by parsing serialized output.
*/
public LogicalExchange(RelInput input) {
super(input);
}
/**
* Creates a LogicalExchange.
*
* @param input Input relational expression
* @param distribution Distribution specification
*/
public static LogicalExchange create(RelNode input,
RelDistribution distribution) {
RelOptCluster cluster = input.getCluster();
distribution = RelDistributionTraitDef.INSTANCE.canonize(distribution);
RelTraitSet traitSet =
input.getTraitSet().replace(Convention.NONE).replace(distribution);
return new LogicalExchange(cluster, traitSet, input, distribution);
}
//~ Methods ----------------------------------------------------------------
@Override public Exchange copy(RelTraitSet traitSet, RelNode newInput,
RelDistribution newDistribution) {
return new LogicalExchange(getCluster(), traitSet, newInput,
newDistribution);
}
@Override public RelNode accept(RelShuttle shuttle) {
return shuttle.visit(this);
}
}
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