| /* |
| * 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.mpp.plan.planner; |
| |
| import org.apache.iotdb.db.mpp.common.MPPQueryContext; |
| import org.apache.iotdb.db.mpp.plan.analyze.Analysis; |
| import org.apache.iotdb.db.mpp.plan.optimization.PlanOptimizer; |
| import org.apache.iotdb.db.mpp.plan.planner.plan.LogicalQueryPlan; |
| import org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNode; |
| import org.apache.iotdb.db.mpp.plan.statement.crud.QueryStatement; |
| |
| import java.util.List; |
| |
| /** Generate a logical plan for the statement. */ |
| public class LogicalPlanner { |
| |
| private final MPPQueryContext context; |
| private final List<PlanOptimizer> optimizers; |
| |
| public LogicalPlanner(MPPQueryContext context, List<PlanOptimizer> optimizers) { |
| this.context = context; |
| this.optimizers = optimizers; |
| } |
| |
| public LogicalQueryPlan plan(Analysis analysis) { |
| PlanNode rootNode = new LogicalPlanVisitor(analysis).process(analysis.getStatement(), context); |
| |
| // optimize the query logical plan |
| if (analysis.getStatement() instanceof QueryStatement) { |
| for (PlanOptimizer optimizer : optimizers) { |
| rootNode = optimizer.optimize(rootNode, context); |
| } |
| } |
| |
| return new LogicalQueryPlan(context, rootNode); |
| } |
| } |