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86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
#pragma once
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#include <Common/escapeForFileName.h>
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#include <Common/quoteString.h>
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#include <Databases/DatabasesCommon.h>
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#include <Interpreters/Context.h>
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#include <Parsers/ASTCreateQuery.h>
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#include <Storages/IStorage.h>
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namespace DB
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{
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std::pair<String, StoragePtr> createTableFromAST(
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ASTCreateQuery ast_create_query,
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const String & database_name,
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const String & table_data_path_relative,
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Context & context,
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bool has_force_restore_data_flag);
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/** Get the string with the table definition based on the CREATE query.
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* It is an ATTACH query that you can execute to create a table from the correspondent database.
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* See the implementation.
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*/
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String getObjectDefinitionFromCreateQuery(const ASTPtr & query);
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/* Class to provide basic operations with tables when metadata is stored on disk in .sql files.
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*/
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class DatabaseOnDisk : public DatabaseWithOwnTablesBase
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{
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public:
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DatabaseOnDisk(const String & name, const String & metadata_path_, const String & logger)
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: DatabaseWithOwnTablesBase(name, logger)
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, metadata_path(metadata_path_)
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, data_path("data/" + escapeForFileName(database_name) + "/") {}
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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 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,
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TableStructureWriteLockHolder & lock) override;
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ASTPtr getCreateDatabaseQuery(const Context & context) const override;
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void drop(const Context & context) override;
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String getObjectMetadataPath(const String & object_name) const override;
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time_t getObjectMetadataModificationTime(const String & object_name) const override;
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String getDataPath() const override { return data_path; }
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String getTableDataPath(const String & table_name) const override { return data_path + escapeForFileName(table_name) + "/"; }
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String getTableDataPath(const ASTCreateQuery & query) const override { return getTableDataPath(query.table); }
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String getMetadataPath() const override { return metadata_path; }
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protected:
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using IteratingFunction = std::function<void(const String &)>;
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void iterateMetadataFiles(const Context & context, const IteratingFunction & iterating_function) const;
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ASTPtr getCreateTableQueryImpl(
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const Context & context,
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const String & table_name,
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bool throw_on_error) const override;
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ASTPtr parseQueryFromMetadata(const Context & context, const String & metadata_file_path, bool throw_on_error = true, bool remove_empty = false) const;
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ASTPtr getCreateQueryFromMetadata(const Context & context, const String & metadata_path, bool throw_on_error) const;
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const String metadata_path;
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const String data_path;
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};
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}
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