| /** |
| * 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.tajo.plan; |
| |
| import org.apache.tajo.algebra.Expr; |
| import org.apache.tajo.catalog.CatalogService; |
| import org.apache.tajo.exception.TajoException; |
| import org.apache.tajo.plan.LogicalPlanner.PlanContext; |
| import org.apache.tajo.plan.logical.LogicalNode; |
| import org.apache.tajo.plan.rewrite.BaseLogicalPlanPreprocessEngine; |
| import org.apache.tajo.plan.rewrite.BaseLogicalPlanPreprocessPhaseProvider; |
| |
| /** |
| * It finds all relations for each block and builds base schema information. |
| */ |
| public class LogicalPlanPreprocessor { |
| private BaseLogicalPlanPreprocessEngine engine; |
| private BaseLogicalPlanPreprocessPhaseProvider provider; |
| |
| LogicalPlanPreprocessor(CatalogService catalog, ExprAnnotator annotator) { |
| provider = new BaseLogicalPlanPreprocessPhaseProvider(); |
| engine = new BaseLogicalPlanPreprocessEngine(catalog, annotator); |
| engine.addProcessPhase(provider.getPhases()); |
| } |
| |
| public LogicalNode process(PlanContext context, Expr expr) throws TajoException { |
| return engine.process(context, expr); |
| } |
| } |