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109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
#pragma once
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#include <mutex>
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#include <unordered_set>
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#include <Databases/DatabasesCommon.h>
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#include <Databases/IDatabase.h>
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#include <Storages/IStorage.h>
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namespace Poco
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{
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class Logger;
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}
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namespace DB
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{
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class ExternalDictionaries;
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/* Database to store StorageDictionary tables
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* automatically creates tables for all dictionaries
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*/
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class DatabaseDictionary : public IDatabase
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{
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public:
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DatabaseDictionary(const String & name_, const Context & context);
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String getEngineName() const override
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{
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return "Dictionary";
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}
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void loadTables(
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Context & context,
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ThreadPool * thread_pool,
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bool has_force_restore_data_flag) override;
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bool isTableExist(
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const Context & context,
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const String & table_name) const override;
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StoragePtr tryGetTable(
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const Context & context,
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const String & table_name) const override;
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DatabaseIteratorPtr getIterator(const Context & context) override;
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bool empty(const Context & context) const override;
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void createTable(
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const Context & context,
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const String & table_name,
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const StoragePtr & table,
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const ASTPtr & query) override;
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void removeTable(
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const Context & context,
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const String & table_name) override;
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void attachTable(const String & table_name, const StoragePtr & table) override;
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StoragePtr detachTable(const String & table_name) override;
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void renameTable(
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const Context & context,
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const String & table_name,
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IDatabase & to_database,
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const String & to_table_name) override;
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void alterTable(
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const Context & context,
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const String & name,
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const NamesAndTypesList & columns,
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const NamesAndTypesList & materialized_columns,
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const NamesAndTypesList & alias_columns,
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const ColumnDefaults & column_defaults,
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const ASTModifier & engine_modifier) override;
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time_t getTableMetadataModificationTime(
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const Context & context,
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const String & table_name) override;
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ASTPtr getCreateTableQuery(
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const Context & context,
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const String & table_name) const override;
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ASTPtr tryGetCreateTableQuery(
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const Context & context,
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const String & table_name) const override;
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ASTPtr getCreateDatabaseQuery(const Context & context) const override;
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void shutdown() override;
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void drop() override;
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private:
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const String name;
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mutable std::mutex mutex;
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const ExternalDictionaries & external_dictionaries;
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std::unordered_set<String> deleted_tables;
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Poco::Logger * log;
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Tables loadTables();
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ASTPtr getCreateTableQueryImpl(const Context & context, const String & table_name, bool throw_on_error) const;
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};
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}
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