| /* |
| * 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.iotdb.db.queryengine.transformation.dag.builder; |
| |
| import org.apache.iotdb.db.queryengine.common.NodeRef; |
| import org.apache.iotdb.db.queryengine.plan.expression.Expression; |
| import org.apache.iotdb.db.queryengine.plan.expression.visitor.IntermediateLayerVisitor; |
| import org.apache.iotdb.db.queryengine.plan.planner.plan.parameter.InputLocation; |
| import org.apache.iotdb.db.queryengine.transformation.api.LayerPointReader; |
| import org.apache.iotdb.db.queryengine.transformation.dag.input.QueryDataSetInputLayer; |
| import org.apache.iotdb.db.queryengine.transformation.dag.intermediate.IntermediateLayer; |
| import org.apache.iotdb.db.queryengine.transformation.dag.memory.LayerMemoryAssigner; |
| import org.apache.iotdb.db.queryengine.transformation.dag.udf.UDTFContext; |
| |
| import org.apache.tsfile.enums.TSDataType; |
| |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| public class EvaluationDAGBuilder { |
| |
| private final String queryId; |
| |
| private final QueryDataSetInputLayer inputLayer; |
| private final Map<String, List<InputLocation>> inputLocations; |
| |
| private final Expression[] outputExpressions; |
| private final LayerPointReader[] outputPointReaders; |
| |
| private final Map<NodeRef<Expression>, TSDataType> expressionTypes; |
| |
| private final UDTFContext udtfContext; |
| |
| private final LayerMemoryAssigner memoryAssigner; |
| |
| // all result column expressions will be split into several sub-expressions, each expression has |
| // its own result point reader. different result column expressions may have the same |
| // sub-expressions, but they can share the same point reader. we cache the point reader here to |
| // make sure that only one point reader will be built for one expression. |
| private final Map<Expression, IntermediateLayer> expressionIntermediateLayerMap; |
| |
| public EvaluationDAGBuilder( |
| String queryId, |
| QueryDataSetInputLayer inputLayer, |
| Map<String, List<InputLocation>> inputLocations, |
| Expression[] outputExpressions, |
| Map<NodeRef<Expression>, TSDataType> expressionTypes, |
| UDTFContext udtfContext, |
| float memoryBudgetInMB) { |
| this.queryId = queryId; |
| this.inputLayer = inputLayer; |
| this.inputLocations = inputLocations; |
| this.outputExpressions = outputExpressions; |
| this.expressionTypes = expressionTypes; |
| this.udtfContext = udtfContext; |
| |
| outputPointReaders = new LayerPointReader[outputExpressions.length]; |
| |
| memoryAssigner = new LayerMemoryAssigner(memoryBudgetInMB); |
| |
| expressionIntermediateLayerMap = new HashMap<>(); |
| } |
| |
| public EvaluationDAGBuilder buildLayerMemoryAssigner() { |
| for (Expression expression : outputExpressions) { |
| expression.updateStatisticsForMemoryAssigner(memoryAssigner); |
| } |
| memoryAssigner.build(); |
| return this; |
| } |
| |
| public EvaluationDAGBuilder bindInputLayerColumnIndexWithExpression() { |
| for (Expression expression : outputExpressions) { |
| expression.bindInputLayerColumnIndexWithExpression(inputLocations); |
| } |
| return this; |
| } |
| |
| public EvaluationDAGBuilder buildResultColumnPointReaders() { |
| IntermediateLayerVisitor visitor = new IntermediateLayerVisitor(); |
| IntermediateLayerVisitor.IntermediateLayerVisitorContext context = |
| new IntermediateLayerVisitor.IntermediateLayerVisitorContext( |
| queryId, |
| udtfContext, |
| inputLayer, |
| expressionIntermediateLayerMap, |
| expressionTypes, |
| memoryAssigner); |
| for (int i = 0; i < outputExpressions.length; ++i) { |
| outputPointReaders[i] = visitor.process(outputExpressions[i], context).constructPointReader(); |
| } |
| return this; |
| } |
| |
| public LayerPointReader[] getOutputPointReaders() { |
| return outputPointReaders; |
| } |
| } |