/**
* 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.common;
import java.util.List;
import org.apache.drill.common.expression.LogicalExpression;
import org.apache.drill.common.logical.data.Filter;
import org.apache.drill.common.logical.data.LogicalOperator;
import org.apache.drill.exec.planner.cost.DrillCostBase;
import org.apache.drill.exec.planner.cost.DrillCostBase.DrillCostFactory;
import org.apache.drill.exec.planner.logical.DrillImplementor;
import org.apache.drill.exec.planner.logical.DrillOptiq;
import org.apache.drill.exec.planner.logical.DrillParseContext;
import org.apache.drill.exec.planner.logical.DrillRel;
import org.apache.drill.exec.planner.physical.PrelUtil;
import org.apache.drill.exec.planner.torel.ConversionContext;
import org.eigenbase.rel.FilterRelBase;
import org.eigenbase.rel.InvalidRelException;
import org.eigenbase.rel.RelNode;
import org.eigenbase.rel.metadata.RelMetadataQuery;
import org.eigenbase.relopt.Convention;
import org.eigenbase.relopt.RelOptCluster;
import org.eigenbase.relopt.RelOptCost;
import org.eigenbase.relopt.RelOptPlanner;
import org.eigenbase.relopt.RelOptUtil;
import org.eigenbase.relopt.RelTraitSet;
import org.eigenbase.rex.RexNode;
/**
* Base class for logical and physical Filters implemented in Drill
*/
public abstract class DrillFilterRelBase extends FilterRelBase implements DrillRelNode {
int numConjuncts = 0;
protected DrillFilterRelBase(Convention convention, RelOptCluster cluster, RelTraitSet traits, RelNode child, RexNode condition) {
super(cluster, traits, child, condition);
assert getConvention() == convention;
// save the number of conjuncts that make up the filter condition such
// that repeated calls to the costing function can use the saved copy
numConjuncts = RelOptUtil.conjunctions(condition).size();
assert numConjuncts >= 1;
}
@Override
public RelOptCost computeSelfCost(RelOptPlanner planner) {
if(PrelUtil.getSettings(getCluster()).useDefaultCosting()) {
return super.computeSelfCost(planner).multiplyBy(.1);
}
RelNode child = this.getChild();
double inputRows = RelMetadataQuery.getRowCount(child);
double cpuCost = DrillCostBase.COMPARE_CPU_COST * numConjuncts * inputRows;
DrillCostFactory costFactory = (DrillCostFactory)planner.getCostFactory();
return costFactory.makeCost(inputRows, cpuCost, 0, 0);
}
protected LogicalExpression getFilterExpression(DrillParseContext context){
return DrillOptiq.toDrill(context, getChild(), getCondition());
}
}