| /* |
| * 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.enumerable.plan; |
| |
| import org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelOptUtil; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.AbstractRelNode; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.RelWriter; |
| import org.apache.calcite.rel.core.TableScan; |
| import org.apache.calcite.rel.metadata.RelMetadataQuery; |
| import org.apache.drill.common.expression.SchemaPath; |
| import org.apache.drill.exec.physical.base.PhysicalOperator; |
| import org.apache.drill.exec.planner.common.DrillRelOptUtil; |
| import org.apache.drill.exec.planner.physical.LeafPrel; |
| import org.apache.drill.exec.planner.physical.PhysicalPlanCreator; |
| import org.apache.drill.exec.planner.physical.visitor.PrelVisitor; |
| import org.apache.drill.exec.record.BatchSchema; |
| import org.apache.drill.exec.record.metadata.TupleMetadata; |
| import org.apache.drill.exec.record.metadata.schema.SchemaProvider; |
| import org.apache.drill.exec.store.enumerable.EnumerableGroupScan; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.stream.Collectors; |
| |
| /** |
| * {@link LeafPrel} implementation that generates java code that may be executed to obtain results |
| * for the provided plan part. |
| */ |
| public class EnumerablePrel extends AbstractRelNode implements LeafPrel { |
| private final String code; |
| private final String schemaPath; |
| private final String plan; |
| private final double rows; |
| private final Map<String, Integer> fieldsMap; |
| private final TupleMetadata schema; |
| private final String planPrefix; |
| |
| public EnumerablePrel(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, EnumerablePrelContext context) { |
| super(cluster, traitSet); |
| this.rowType = input.getRowType(); |
| this.rows = input.estimateRowCount(cluster.getMetadataQuery()); |
| |
| this.planPrefix = context.getPlanPrefix(); |
| RelNode transformedNode = context.transformNode(input); |
| |
| this.fieldsMap = context.getFieldsMap(transformedNode); |
| |
| this.plan = RelOptUtil.toString(transformedNode); |
| this.code = context.generateCode(cluster, transformedNode); |
| |
| this.schemaPath = context.getTablePath(input); |
| try { |
| TableScan scan = Objects.requireNonNull(DrillRelOptUtil.findScan(input)); |
| SchemaProvider schemaProvider = DrillRelOptUtil.getDrillTable(scan) |
| .getMetadataProviderManager().getSchemaProvider(); |
| this.schema = schemaProvider != null ? schemaProvider.read().getSchema() : null; |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public PhysicalOperator getPhysicalOperator(PhysicalPlanCreator creator) { |
| List<SchemaPath> columns = rowType.getFieldNames().stream() |
| .map(SchemaPath::getSimplePath) |
| .collect(Collectors.toList()); |
| EnumerableGroupScan groupScan = new EnumerableGroupScan(code, columns, fieldsMap, rows, schema, schemaPath); |
| return creator.addMetadata(this, groupScan); |
| } |
| |
| @Override |
| public RelWriter explainTerms(RelWriter pw) { |
| pw.item(planPrefix, plan); |
| return super.explainTerms(pw); |
| } |
| |
| @Override |
| public double estimateRowCount(RelMetadataQuery mq) { |
| return rows; |
| } |
| |
| @Override |
| public <T, X, E extends Throwable> T accept(PrelVisitor<T, X, E> logicalVisitor, X value) throws E { |
| return logicalVisitor.visitLeaf(this, value); |
| } |
| |
| @Override |
| public BatchSchema.SelectionVectorMode[] getSupportedEncodings() { |
| return BatchSchema.SelectionVectorMode.DEFAULT; |
| } |
| |
| @Override |
| public BatchSchema.SelectionVectorMode getEncoding() { |
| return BatchSchema.SelectionVectorMode.NONE; |
| } |
| } |