| /* |
| * 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.jdbc; |
| |
| import java.util.List; |
| |
| import org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.drill.exec.physical.base.PhysicalOperator; |
| import org.apache.drill.exec.planner.physical.PhysicalPlanCreator; |
| import org.apache.drill.exec.planner.physical.Prel; |
| import org.apache.drill.exec.planner.physical.SinglePrel; |
| import org.apache.drill.exec.planner.physical.visitor.PrelVisitor; |
| import org.apache.drill.exec.planner.sql.handlers.PrelFinalizable; |
| import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode; |
| |
| /** |
| * Prel used to represent a JDBC Conversion within an expression tree. This Prel will replaced with a full JdbcPrel |
| * before execution can happen. |
| */ |
| public class JdbcIntermediatePrel extends SinglePrel implements PrelFinalizable { |
| |
| public JdbcIntermediatePrel(RelOptCluster cluster, RelTraitSet traits, RelNode child) { |
| super(cluster, traits, child); |
| } |
| |
| @Override |
| public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public RelNode copy(RelTraitSet traitSet, List<RelNode> inputs) { |
| return new JdbcIntermediatePrel(getCluster(), traitSet, getInput()); |
| } |
| |
| @Override |
| protected Object clone() throws CloneNotSupportedException { |
| return copy(getTraitSet(), getInputs()); |
| } |
| |
| @Override |
| public SelectionVectorMode getEncoding() { |
| return SelectionVectorMode.NONE; |
| } |
| |
| @Override |
| public Prel finalizeRel() { |
| return new JdbcPrel(getCluster(), getTraitSet(), this); |
| } |
| |
| @Override |
| public <T, X, E extends Throwable> T accept(PrelVisitor<T, X, E> logicalVisitor, X value) { |
| throw new UnsupportedOperationException("This needs to be finalized before using a PrelVisitor."); |
| } |
| |
| @Override |
| public boolean needsFinalColumnReordering() { |
| return false; |
| } |
| } |