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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,
* 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 java.util.List;
import java.util.Map;
import org.apache.drill.common.logical.PlanProperties;
import org.apache.drill.common.logical.PlanProperties.Generator.ResultMode;
import org.apache.drill.common.logical.PlanProperties.PlanPropertiesBuilder;
import org.apache.drill.common.logical.PlanProperties.PlanType;
import org.apache.drill.exec.ops.QueryContext;
import org.apache.drill.exec.physical.PhysicalPlan;
import org.apache.drill.exec.physical.base.PhysicalOperator;
import org.apache.drill.exec.planner.physical.explain.PrelSequencer.OpId;
import org.apache.drill.shaded.guava.com.google.common.collect.Lists;
public class PhysicalPlanCreator {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(PhysicalPlanCreator.class);
private final Map<Prel, OpId> opIdMap;
private List<PhysicalOperator> popList;
private final QueryContext context;
PhysicalPlan plan = null;
public PhysicalPlanCreator(QueryContext context, Map<Prel, OpId> opIdMap) {
this.context = context;
this.opIdMap = opIdMap;
popList = Lists.newArrayList();
}
public QueryContext getContext() {
return context;
}
public PhysicalOperator addMetadata(Prel originalPrel, PhysicalOperator op){
op.setOperatorId(opIdMap.get(originalPrel).getAsSingleInt());
op.setCost(originalPrel.estimateRowCount(originalPrel.getCluster().getMetadataQuery()));
return op;
}
public PhysicalPlan build(Prel rootPrel, boolean forceRebuild) {
if (plan != null && !forceRebuild) {
return plan;
}
PlanPropertiesBuilder propsBuilder = PlanProperties.builder();
propsBuilder.type(PlanType.APACHE_DRILL_PHYSICAL);
propsBuilder.version(1);
propsBuilder.resultMode(ResultMode.EXEC);
propsBuilder.generator(PhysicalPlanCreator.class.getName(), "");
try {
// invoke getPhysicalOperator on the root Prel which will recursively invoke it
// on the descendants and we should have a well-formed physical operator tree
PhysicalOperator rootPOP = rootPrel.getPhysicalOperator(this);
if (rootPOP != null) {
assert (popList.size() > 0); //getPhysicalOperator() is supposed to populate this list
plan = new PhysicalPlan(propsBuilder.build(), popList);
}
} catch (IOException e) {
plan = null;
throw new UnsupportedOperationException("Physical plan created failed with error : " + e.toString());
}
return plan;
}
}
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