| /** |
| * 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. |
| **/ |
| |
| #include "query_optimizer/QueryProcessor.hpp" |
| |
| #include <fstream> |
| #include <memory> |
| #include <string> |
| |
| #include "catalog/Catalog.hpp" |
| #include "catalog/Catalog.pb.h" |
| #include "query_optimizer/Optimizer.hpp" |
| #include "query_optimizer/OptimizerContext.hpp" |
| |
| using std::ifstream; |
| using std::ofstream; |
| |
| namespace quickstep { |
| |
| void QueryProcessor::generateQueryHandle(const ParseStatement &statement, |
| QueryHandle *query_handle) { |
| optimizer::OptimizerContext optimizer_context; |
| |
| optimizer_.generateQueryHandle(statement, getDefaultDatabase(), &optimizer_context, query_handle); |
| |
| if (optimizer_context.is_catalog_changed() && !catalog_altered_) { |
| catalog_altered_ = true; |
| } |
| |
| ++query_id_; |
| } |
| |
| void QueryProcessor::saveCatalog() { |
| if (catalog_altered_) { |
| ofstream catalog_file(catalog_filename_.c_str()); |
| |
| if (!catalog_->getProto().SerializeToOstream(&catalog_file)) { |
| throw UnableToWriteCatalog(catalog_filename_); |
| } |
| |
| catalog_file.close(); |
| |
| catalog_altered_ = false; |
| } |
| } |
| |
| void QueryProcessor::loadCatalog() { |
| ifstream catalog_file(catalog_filename_.c_str()); |
| if (!catalog_file.good()) { |
| throw UnableToReadCatalog(catalog_filename_); |
| } |
| |
| serialization::Catalog catalog_proto; |
| if (!catalog_proto.ParseFromIstream(&catalog_file)) { |
| throw CatalogNotProto(catalog_filename_); |
| } |
| catalog_file.close(); |
| catalog_ = std::make_unique<Catalog>(catalog_proto); |
| |
| catalog_altered_ = false; |
| } |
| |
| } // namespace quickstep |