| /* |
| * 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, |
| * 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 org.apache.drill.exec.store.enumerable.plan; |
| |
| import org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.SingleRel; |
| import org.apache.drill.common.logical.data.LogicalOperator; |
| import org.apache.drill.exec.planner.logical.DrillImplementor; |
| import org.apache.drill.exec.planner.logical.DrillRel; |
| |
| import java.util.List; |
| |
| /** |
| * The vertex simply holds the child nodes but contains its own traits. |
| * Used for completing Drill logical planning when child nodes have some specific traits. |
| */ |
| public class VertexDrel extends SingleRel implements DrillRel { |
| |
| public VertexDrel(RelOptCluster cluster, RelTraitSet traits, RelNode input) { |
| super(cluster, traits, input); |
| } |
| |
| @Override |
| public RelNode copy(RelTraitSet traitSet, List<RelNode> inputs) { |
| return new VertexDrel(getCluster(), traitSet, inputs.iterator().next()); |
| } |
| |
| @Override |
| protected Object clone() { |
| return copy(getTraitSet(), getInputs()); |
| } |
| |
| @Override |
| public LogicalOperator implement(DrillImplementor implementor) { |
| throw new UnsupportedOperationException(); |
| } |
| } |