/**
* 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.planner.physical;
import java.io.IOException;
import org.apache.calcite.plan.Convention;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.planner.common.DrillRelNode;
import org.apache.drill.exec.planner.physical.visitor.PrelVisitor;
import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode;
public interface Prel extends DrillRelNode, Iterable<Prel>{
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(Prel.class);
final static Convention DRILL_PHYSICAL = new Convention.Impl("PHYSICAL", Prel.class);
public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) throws IOException;
public <T, X, E extends Throwable> T accept(PrelVisitor<T, X, E> logicalVisitor, X value) throws E;
/**
* Supported 'encodings' of a Prel indicates what are the acceptable modes of SelectionVector
* of its child Prel
*/
public SelectionVectorMode[] getSupportedEncodings();
/**
* A Prel's own SelectionVector mode - i.e whether it generates an SV2, SV4 or None
*/
public SelectionVectorMode getEncoding();
boolean needsFinalColumnReordering();
// DRILL-3011
// public abstract Prel copy(RelTraitSet paramRelTraitSet, List<RelNode> paramList);
}