| /* |
| * 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.Iterator; |
| import java.util.List; |
| |
| import org.apache.drill.exec.planner.common.DrillSortRelBase; |
| import com.google.common.collect.Lists; |
| import org.apache.calcite.rel.RelCollationImpl; |
| import org.apache.calcite.rel.RelFieldCollation; |
| import org.apache.drill.exec.ExecConstants; |
| import org.apache.drill.exec.physical.base.PhysicalOperator; |
| import org.apache.drill.exec.physical.config.ExternalSort; |
| import org.apache.drill.exec.planner.cost.DrillCostBase; |
| import org.apache.drill.exec.planner.cost.DrillCostBase.DrillCostFactory; |
| import org.apache.drill.exec.planner.physical.visitor.PrelVisitor; |
| import org.apache.drill.exec.record.BatchSchema.SelectionVectorMode; |
| import org.apache.calcite.rel.RelCollation; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.metadata.RelMetadataQuery; |
| import org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelOptCost; |
| import org.apache.calcite.plan.RelOptPlanner; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rex.RexNode; |
| |
| public class SortPrel extends DrillSortRelBase implements Prel { |
| private final boolean isRemovable; |
| |
| /** Creates a DrillSortRel. */ |
| public SortPrel(RelOptCluster cluster, RelTraitSet traits, RelNode input, RelCollation collation) { |
| super(cluster, traits, input, collation); |
| isRemovable = true; |
| } |
| |
| /** Creates a DrillSortRel with offset and fetch. */ |
| public SortPrel(RelOptCluster cluster, RelTraitSet traits, RelNode input, RelCollation collation, RexNode offset, RexNode fetch) { |
| super(cluster, traits, input, collation, offset, fetch); |
| isRemovable = true; |
| } |
| |
| /** Creates a DrillSortRel. */ |
| public SortPrel(RelOptCluster cluster, RelTraitSet traits, RelNode input, RelCollation collation, boolean isRemovable) { |
| super(cluster, traits, input, collation); |
| this.isRemovable = isRemovable; |
| } |
| |
| @Override |
| public RelOptCost computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq) { |
| if(PrelUtil.getSettings(getCluster()).useDefaultCosting()) { |
| //We use multiplier 0.05 for TopN operator, and 0.1 for Sort, to make TopN a preferred choice. |
| return super.computeSelfCost(planner, mq).multiplyBy(.1); |
| } |
| |
| RelNode child = this.getInput(); |
| double inputRows = mq.getRowCount(child); |
| // int rowWidth = child.getRowType().getPrecision(); |
| int numSortFields = this.collation.getFieldCollations().size(); |
| double cpuCost = DrillCostBase.COMPARE_CPU_COST * numSortFields * inputRows * (Math.log(inputRows)/Math.log(2)); |
| double diskIOCost = 0; // assume in-memory for now until we enforce operator-level memory constraints |
| |
| // TODO: use rowWidth instead of avgFieldWidth * numFields |
| // avgFieldWidth * numFields * inputRows |
| double numFields = this.getRowType().getFieldCount(); |
| long fieldWidth = PrelUtil.getPlannerSettings(planner).getOptions() |
| .getOption(ExecConstants.AVERAGE_FIELD_WIDTH_KEY).num_val; |
| |
| double memCost = fieldWidth * numFields * inputRows; |
| |
| DrillCostFactory costFactory = (DrillCostFactory) planner.getCostFactory(); |
| return costFactory.makeCost(inputRows, cpuCost, diskIOCost, 0, memCost); |
| } |
| |
| @Override |
| public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) throws IOException { |
| Prel child = (Prel) this.getInput(); |
| |
| PhysicalOperator childPOP = child.getPhysicalOperator(creator); |
| |
| org.apache.drill.exec.physical.config.Sort g = new ExternalSort(childPOP, PrelUtil.getOrdering(this.collation, getInput().getRowType()), false); |
| return creator.addMetadata(this, g); |
| } |
| |
| @Override |
| public SortPrel copy( |
| RelTraitSet traitSet, |
| RelNode newInput, |
| RelCollation newCollation, |
| RexNode offset, |
| RexNode fetch) { |
| return new SortPrel(getCluster(), traitSet, newInput, newCollation); |
| } |
| |
| @Override |
| public Iterator<Prel> iterator() { |
| return PrelUtil.iter(getInput()); |
| } |
| |
| @Override |
| public <T, X, E extends Throwable> T accept(PrelVisitor<T, X, E> logicalVisitor, X value) throws E { |
| return logicalVisitor.visitPrel(this, value); |
| } |
| |
| @Override |
| public SelectionVectorMode[] getSupportedEncodings() { |
| return SelectionVectorMode.NONE_AND_TWO; |
| } |
| |
| @Override |
| public SelectionVectorMode getEncoding() { |
| return SelectionVectorMode.FOUR_BYTE; |
| } |
| |
| @Override |
| public boolean needsFinalColumnReordering() { |
| return true; |
| } |
| |
| @Override |
| public Prel prepareForLateralUnnestPipeline(List<RelNode> children) { |
| List<RelFieldCollation> relFieldCollations = Lists.newArrayList(); |
| relFieldCollations.add(new RelFieldCollation(0, |
| RelFieldCollation.Direction.ASCENDING, RelFieldCollation.NullDirection.FIRST)); |
| for (RelFieldCollation fieldCollation : this.collation.getFieldCollations()) { |
| relFieldCollations.add(new RelFieldCollation(fieldCollation.getFieldIndex() + 1, |
| fieldCollation.direction, fieldCollation.nullDirection)); |
| } |
| |
| @SuppressWarnings("deprecation") |
| RelCollation collationTrait = RelCollationImpl.of(relFieldCollations); |
| RelTraitSet traits = RelTraitSet.createEmpty() |
| .replace(this.getTraitSet().getTrait(DrillDistributionTraitDef.INSTANCE)) |
| .replace(collationTrait) |
| .replace(DRILL_PHYSICAL); |
| |
| return this.copy(traits, children.get(0), collationTrait, this.offset, this.fetch); |
| } |
| |
| @Override |
| public boolean canBeDropped() { |
| return isRemovable; |
| } |
| } |