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/* Copyright (c) 2014, 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.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
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
separately licensed software that they have either included with
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
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#ifndef DD__DD_INCLUDED
#define DD__DD_INCLUDED
namespace dd {
///////////////////////////////////////////////////////////////////////////
// enum type to pass to init() function.
enum class enum_dd_init_type {
DD_INITIALIZE = 1,
DD_INITIALIZE_SYSTEM_VIEWS,
DD_RESTART_OR_UPGRADE,
DD_POPULATE_UPGRADE,
DD_DELETE,
DD_UPDATE_I_S_METADATA,
DD_INITIALIZE_NON_DD_BASED_SYSTEM_VIEWS
};
/**
Initialize data dictionary upon server startup, server startup on old
data directory or install data dictionary for the first time.
@param dd_init - Option for initialization, population or deletion
of data dictionary.
@return false - On success
@return true - On error
*/
bool init(enum_dd_init_type dd_init);
/**
Shuts down the data dictionary instance by deleting
the instance of dd::Dictionary_impl* upon server shutdown.
@return false - On success
@return true - If invoked when data dictionary instance
is not yet initialized.
*/
bool shutdown();
/**
Get the data dictionary instance.
@returns 'Dictionary*' pointer to data dictionary instance.
Else returns NULL if data dictionary is not
initialized.
*/
class Dictionary *get_dictionary();
/**
Create a instance of data dictionary object of type X.
E.g., X could be 'dd::Table', 'dd::View' and etc.
@returns Pointer to the newly allocated dictionary object.
*/
template <typename X>
X *create_object();
///////////////////////////////////////////////////////////////////////////
} // namespace dd
#endif // DD__DD_INCLUDED
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