com.hazelcast.jet.sql.impl.opt.physical.RootRel Maven / Gradle / Ivy
/*
* Copyright 2021 Hazelcast Inc.
*
* Licensed under the Hazelcast Community License (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://hazelcast.com/hazelcast-community-license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.jet.sql.impl.opt.physical;
import com.hazelcast.jet.core.Vertex;
import com.hazelcast.sql.impl.QueryParameterMetadata;
import com.hazelcast.sql.impl.plan.node.PlanNodeSchema;
import com.hazelcast.org.apache.calcite.plan.RelOptCost;
import com.hazelcast.org.apache.calcite.plan.RelOptPlanner;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.RelWriter;
import com.hazelcast.org.apache.calcite.rel.SingleRel;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMetadataQuery;
public class RootRel extends SingleRel implements PhysicalRel {
public RootRel(RelNode input) {
super(input.getCluster(), RelTraitSet.createEmpty(), input);
}
@Override
public PlanNodeSchema schema(QueryParameterMetadata parameterMetadata) {
throw new UnsupportedOperationException();
}
@Override
public Vertex accept(CreateDagVisitor visitor) {
return visitor.onRoot(this);
}
@Override
public final RelWriter explainTerms(RelWriter pw) {
return super.explainTerms(pw);
}
@Override
public final RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) {
double rows = mq.getRowCount(getInput());
double cpu = rows;
return planner.getCostFactory().makeCost(rows, cpu, 0);
}
}
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