| /** |
| * 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. |
| **/ |
| |
| #ifndef QUICKSTEP_QUERY_OPTIMIZER_EXPRESSIONS_LOGICAL_TABLE_REFERENCE_HPP_ |
| #define QUICKSTEP_QUERY_OPTIMIZER_EXPRESSIONS_LOGICAL_TABLE_REFERENCE_HPP_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "query_optimizer/OptimizerTree.hpp" |
| #include "query_optimizer/expressions/AttributeReference.hpp" |
| #include "query_optimizer/logical/Logical.hpp" |
| #include "query_optimizer/logical/LogicalType.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| |
| class CatalogRelation; |
| |
| namespace optimizer { |
| |
| class OptimizerContext; |
| |
| namespace logical { |
| |
| /** \addtogroup OptimizerLogical |
| * @{ |
| */ |
| |
| class TableReference; |
| typedef std::shared_ptr<const TableReference> TableReferencePtr; |
| |
| /** |
| * @brief Leaf logical operator that represents a reference to |
| * a catalog relation. |
| */ |
| class TableReference : public Logical { |
| public: |
| LogicalType getLogicalType() const override { return LogicalType::kTableReference; } |
| |
| std::string getName() const override { return "TableReference"; } |
| |
| /** |
| * @return The catalog relation which the operator scans. |
| */ |
| const CatalogRelation* catalog_relation() const { return catalog_relation_; } |
| |
| /** |
| * @return The relation alias. |
| */ |
| const std::string& relation_alias() const { return relation_alias_; } |
| |
| /** |
| * @return The references to the attributes in the relation. |
| */ |
| const std::vector<expressions::AttributeReferencePtr>& attribute_list() const { |
| return attribute_list_; |
| } |
| |
| LogicalPtr copyWithNewChildren( |
| const std::vector<LogicalPtr> &new_children) const override; |
| |
| std::vector<expressions::AttributeReferencePtr> getOutputAttributes() const override { |
| return attribute_list_; |
| } |
| |
| std::vector<expressions::AttributeReferencePtr> getReferencedAttributes() const override { |
| return getOutputAttributes(); |
| } |
| |
| /** |
| * @brief Generates a AttributeRerference for each CatalogAttribute in the \p |
| * catalog_relation and creates a TableReference on it. |
| * |
| * @param catalog_relation The catalog relation to be scanned. |
| * @param relation_alias The relation alias. This is stored here for the printing purpose only. |
| * @param optimizer_context The OptimizerContext for the query. |
| * @return An immutable TableReference. |
| */ |
| static TableReferencePtr Create(const CatalogRelation *catalog_relation, |
| const std::string &relation_alias, |
| OptimizerContext *optimizer_context) { |
| DCHECK(!relation_alias.empty()); |
| return TableReferencePtr( |
| new TableReference(catalog_relation, relation_alias, optimizer_context)); |
| } |
| |
| protected: |
| void getFieldStringItems( |
| std::vector<std::string> *inline_field_names, |
| std::vector<std::string> *inline_field_values, |
| std::vector<std::string> *non_container_child_field_names, |
| std::vector<OptimizerTreeBaseNodePtr> *non_container_child_fields, |
| std::vector<std::string> *container_child_field_names, |
| std::vector<std::vector<OptimizerTreeBaseNodePtr>> *container_child_fields) const override; |
| |
| private: |
| TableReference(const CatalogRelation *catalog_relation, |
| const std::string &relation_alias, |
| OptimizerContext *optimizer_context); |
| |
| // Constructor where the attribute list is explicitly given. |
| TableReference( |
| const CatalogRelation *catalog_relation, |
| const std::string &relation_alias, |
| const std::vector<expressions::AttributeReferencePtr> &attribute_list) |
| : catalog_relation_(catalog_relation), |
| relation_alias_(relation_alias), |
| attribute_list_(attribute_list) {} |
| |
| const CatalogRelation *catalog_relation_; |
| const std::string relation_alias_; |
| std::vector<expressions::AttributeReferencePtr> attribute_list_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TableReference); |
| }; |
| |
| /** @} */ |
| |
| } // namespace logical |
| } // namespace optimizer |
| } // namespace quickstep |
| |
| #endif /* QUICKSTEP_QUERY_OPTIMIZER_EXPRESSIONS_LOGICAL_TABLE_REFERENCE_HPP_ */ |