sql_tablespace.h

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/* Copyright (c) 2006, 2025, Oracle and/or its affiliates.
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.
 
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   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
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   the program or referenced in the documentation.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.
 
   You should have received a copy of the GNU General Public License
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef SQL_TABLESPACE_INCLUDED
#define SQL_TABLESPACE_INCLUDED
 
#include <sys/types.h>
 
#include <optional>
 
#include "lex_string.h"
#include "my_inttypes.h"
#include "my_sqlcommand.h"
#include "sql/handler.h"      // ts_command_type
#include "sql/sql_cmd_ddl.h"  // Sql_cmd_ddl
 
class THD;
 
/**
  Structure used by parser to store options for tablespace statements
  and pass them on to Execution classes.
 */
struct Tablespace_options {
  ulonglong extent_size = 1024 * 1024;           // Default 1 MByte
  ulonglong undo_buffer_size = 8 * 1024 * 1024;  // Default 8 MByte
  ulonglong redo_buffer_size = 8 * 1024 * 1024;  // Default 8 MByte
  ulonglong initial_size = 128 * 1024 * 1024;    // Default 128 MByte
  std::optional<ulonglong> autoextend_size;      // No autoextension as default
  ulonglong max_size = 0;         // Max size == initial size => no extension
  ulonglong file_block_size = 0;  // 0=default or must be a valid Page Size
  uint nodegroup_id = UNDEF_NODEGROUP;
  bool wait_until_completed = true;
  LEX_STRING ts_comment = {nullptr, 0};  // FIXME: Rename to comment?
  LEX_CSTRING engine_name = {nullptr, 0};
  LEX_STRING encryption = {nullptr, 0};
 
  LEX_CSTRING engine_attribute = NULL_CSTR;
};
 
/**
  Check if tablespace name has valid length.
 
  @param tablespace_name        Name of the tablespace
 
  @note Tablespace names are not reflected in the file system, so
        character case conversion or consideration is not relevant.
 
  @note Checking for path characters or ending space is not done.
        The checks are for identifier length, both in terms of
        number of characters and number of bytes.
 
  @retval  false   No error encountered while checking length.
  @retval  true    Error encountered and reported.
*/
 
bool validate_tablespace_name_length(const char *tablespace_name);
 
/**
  Check if a tablespace name is valid.
 
  SE specific validation is done by the SE by invoking a handlerton method.
 
  @param ts_cmd                 Whether this is tablespace DDL or not.
  @param tablespace_name        Name of the tablespace
  @param engine                 Handlerton for the tablespace.
 
  @retval  false   No error encountered while checking the name.
  @retval  true    Error encountered and reported.
*/
 
bool validate_tablespace_name(ts_command_type ts_cmd,
                              const char *tablespace_name,
                              const handlerton *engine);
 
/**
  Base class for tablespace execution classes including
  CREATE/ALTER/DROP TABLESPACE and LOGFILE GROUP commands.
 */
class Sql_cmd_tablespace : public Sql_cmd_ddl /* purecov: inspected */
{
 protected:
  const LEX_STRING m_tablespace_name;
  const Tablespace_options *m_options;
 
  /**
    Creates shared base object.
 
    @param  name      name of tablespace
    @param  options   additional options to statement
   */
  Sql_cmd_tablespace(const LEX_STRING &name, const Tablespace_options *options);
 
 public:
  /**
    Provide access to the command code enum value.
    @return command code enum value
   */
  enum_sql_command sql_command_code() const final;
  /**
    Return the Tablespace_options for this object.
   */
  const Tablespace_options get_options() const { return *m_options; }
};
 
/**
  Execution class for CREATE TABLESPACE ... ADD DATAFILE ...
 */
class Sql_cmd_create_tablespace final
    : public Sql_cmd_tablespace /* purecov: inspected */
{
  const LEX_STRING m_datafile_name;
  const LEX_STRING m_logfile_group_name;
  bool m_auto_generate_datafile_name;
 
 public:
  /**
    Creates execution class instance for create tablespace statement.
 
    @param  tsname    name of tablespace
    @param  dfname    name of data file
    @param  lfgname   name of logfile group (may be {nullptr, 0})
    @param  options   additional options to statement
  */
  Sql_cmd_create_tablespace(const LEX_STRING &tsname, const LEX_STRING &dfname,
                            const LEX_STRING &lfgname,
                            const Tablespace_options *options);
 
  bool execute(THD *) override;
};
 
/**
  Execution class for DROP TABLESPACE ...
 */
class Sql_cmd_drop_tablespace final
    : public Sql_cmd_tablespace /* purecov: inspected */
{
 public:
  /**
    Creates execution class instance for drop tablespace statement.
 
    @param tsname name of tablespace
    @param options additional options to statement
  */
  Sql_cmd_drop_tablespace(const LEX_STRING &tsname,
                          const Tablespace_options *options);
  bool execute(THD *) override;
};
 
/**
  Execution class for ALTER TABLESPACE ... tablespace_options
 */
class Sql_cmd_alter_tablespace final : public Sql_cmd_tablespace {
 public:
  /**
    Creates execution class instance for plain alter tablespace
    (modifying options).
 
    @param ts_name name of tablespace
    @param options additional options to statement
  */
  Sql_cmd_alter_tablespace(const LEX_STRING &ts_name,
                           const Tablespace_options *options);
 
  bool execute(THD *thd) override;
};
 
/**
  Execution class for ALTER TABLESPACE ... ADD DATAFILE ...
 */
class Sql_cmd_alter_tablespace_add_datafile final
    : public Sql_cmd_tablespace /* purecov: inspected */
{
  const LEX_STRING m_datafile_name;
 
 public:
  /**
    Creates execution class instance for add datafile statement.
 
    @param  tsname    name of tablespace
    @param  dfname    name of data file to add
    @param  options   additional options to statement
  */
  Sql_cmd_alter_tablespace_add_datafile(const LEX_STRING &tsname,
                                        const LEX_STRING &dfname,
                                        const Tablespace_options *options);
  bool execute(THD *) override;
};
 
/**
  Execution class for ALTER TABLESPACE ... DROP DATAFILE ...
 */
class Sql_cmd_alter_tablespace_drop_datafile final
    : public Sql_cmd_tablespace /* purecov: inspected */
{
  const LEX_STRING m_datafile_name;
 
 public:
  /**
    Creates execution class instance for drop datafile statement.
 
    @param  tsname    name of tablespace
    @param  dfname    name of data file to drop
    @param  options   additional options to statement
  */
  Sql_cmd_alter_tablespace_drop_datafile(const LEX_STRING &tsname,
                                         const LEX_STRING &dfname,
                                         const Tablespace_options *options);
  bool execute(THD *) override;
};
 
/**
  Execution class for ALTER TABLESPACE ... RENAME TO ...
 */
class Sql_cmd_alter_tablespace_rename final
    : public Sql_cmd_tablespace /* purecov: inspected */
{
  const LEX_STRING m_new_name;
 
 public:
  /**
    Creates execution class instance for rename statement.
 
    @param old_name existing tablespace
    @param new_name desired tablespace name
   */
  Sql_cmd_alter_tablespace_rename(const LEX_STRING &old_name,
                                  const LEX_STRING &new_name);
  bool execute(THD *) override;
};
 
/**
  Execution class for CREATE UNDO TABLESPACE
 */
class Sql_cmd_create_undo_tablespace final : public Sql_cmd {
  const ts_command_type m_cmd;
  const LEX_STRING m_undo_tablespace_name;
  const LEX_STRING m_datafile_name;
  const Tablespace_options *m_options;
 
 public:
  /**
    Creates execution class instance for undo tablespace statements.
 
    @param  cmd_type  subcommand passed to se
    @param  utsname   name of undo tablespace
    @param  dfname    name of data file
    @param  options   additional options to statemente
   */
  Sql_cmd_create_undo_tablespace(const ts_command_type cmd_type,
                                 const LEX_STRING &utsname,
                                 const LEX_STRING &dfname,
                                 const Tablespace_options *options);
 
  bool execute(THD *) override;
  enum_sql_command sql_command_code() const override;
};
 
/**
  Execution class for ALTER UNDO TABLESPACE
 */
class Sql_cmd_alter_undo_tablespace final : public Sql_cmd {
  const ts_command_type m_cmd;
  const LEX_STRING m_undo_tablespace_name;
  const LEX_STRING m_datafile_name;
  const ts_alter_tablespace_type m_at_type;
  const Tablespace_options *m_options;
 
 public:
  /**
    Creates execution class instance for undo tablespace statements.
 
    @param  cmd_type  subcommand passed to se
    @param  utsname   name of undo tablespace
    @param  dfname    name of data file
    @param  options   additional options to statemente
    @param  at_type   alter tablespace subcommand passed to se
   */
  Sql_cmd_alter_undo_tablespace(
      const ts_command_type cmd_type, const LEX_STRING &utsname,
      const LEX_STRING &dfname, const Tablespace_options *options,
      ts_alter_tablespace_type at_type = TS_ALTER_TABLESPACE_TYPE_NOT_DEFINED);
 
  bool execute(THD *) override;
  enum_sql_command sql_command_code() const override;
};
 
/**
  Execution class for DROP UNDO TABLESPACE
 */
class Sql_cmd_drop_undo_tablespace final : public Sql_cmd {
  const ts_command_type m_cmd;
  const LEX_STRING m_undo_tablespace_name;
  const LEX_STRING m_datafile_name;
  const Tablespace_options *m_options;
 
 public:
  /**
    Creates execution class instance for drop undo tablespace statements.
 
    @param  cmd_type  subcommand passed to se
    @param  utsname   name of undo tablespace
    @param  dfname    name of data file
    @param  options   additional options to statemente
   */
  Sql_cmd_drop_undo_tablespace(const ts_command_type cmd_type,
                               const LEX_STRING &utsname,
                               const LEX_STRING &dfname,
                               const Tablespace_options *options);
 
  bool execute(THD *) override;
  enum_sql_command sql_command_code() const override;
};
 
/**
  Execution class for CREATE/DROP/ALTER LOGFILE GROUP ...
 */
class Sql_cmd_logfile_group final : public Sql_cmd /* purecov: inspected */
{
  const ts_command_type m_cmd;
  const LEX_STRING m_logfile_group_name;
  const LEX_STRING m_undofile_name;
  const Tablespace_options *m_options;
 
 public:
  /**
    Creates execution class instance for logfile group statements.
 
    @param cmd_type subcommand passed to se
    @param logfile_group_name name of logfile group
    @param options additional options to statement
    @param undofile_name name of undo file
   */
  Sql_cmd_logfile_group(const ts_command_type cmd_type,
                        const LEX_STRING &logfile_group_name,
                        const Tablespace_options *options,
                        const LEX_STRING &undofile_name = {nullptr, 0});
 
  bool execute(THD *thd) override;
 
  enum_sql_command sql_command_code() const override;
};
 
#endif /* SQL_TABLESPACE_INCLUDED */