| /** |
| * Copyright 2011-2015 Quickstep Technologies LLC. |
| * Copyright 2015-2016 Pivotal Software, Inc. |
| * |
| * Licensed 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 <cstdlib> |
| #include <fstream> |
| #include <memory> |
| #include <string> |
| |
| #include "catalog/Catalog.hpp" |
| #include "catalog/Catalog.pb.h" |
| #include "catalog/CatalogDatabase.hpp" |
| #include "catalog/CatalogRelation.hpp" |
| #include "parser/ParseStatement.hpp" |
| #include "query_optimizer/Optimizer.hpp" |
| #include "query_optimizer/QueryHandle.hpp" |
| #include "storage/StorageManager.hpp" |
| |
| using std::ifstream; |
| using std::ofstream; |
| |
| namespace quickstep { |
| |
| QueryHandle* QueryProcessor::generateQueryHandle(const ParseStatement &statement) { |
| std::unique_ptr<QueryHandle> query_handle(new QueryHandle(query_id_)); |
| |
| optimizer::Optimizer optimizer(query_id_, getDefaultDatabase(), storage_manager_.get()); |
| optimizer.generateQueryHandle(statement, query_handle.get()); |
| |
| if (optimizer.isCatalogChanged() && !catalog_altered_) { |
| catalog_altered_ = true; |
| } |
| |
| ++query_id_; |
| |
| return query_handle.release(); |
| } |
| |
| 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_.reset(new Catalog(catalog_proto)); |
| |
| catalog_altered_ = false; |
| } |
| |
| } // namespace quickstep |