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binlog_ext.h
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/*****************************************************************************
Copyright (c) 2025, Alibaba and/or its affiliates. All Rights Reserved.
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 also distributed 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
included with MySQL.
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 BINLOG_EXT_INCLUDED
#define BINLOG_EXT_INCLUDED
#include <my_systime.h>
#include <atomic>
#include <vector>
#include "libbinlogevents/include/control_events.h"
#include "map_helpers.h"
#include "my_inttypes.h"
#include "mysql/components/services/bits/mysql_mutex_bits.h"
#include "rpl_commit_stage_manager.h"
#include "sql/basic_ostream.h"
#include "sql/binlog.h"
#include "sql/log_event.h"
#include "sql/sql_class.h"
#include "sql/xa.h"
/** Extension of MYSQL_BIN_LOG. */
class Binlog_ext {
public:
Binlog_ext() {}
/**
Initialize at server startup.
*/
void init();
/**
Binlog_ext has something to do when opening or rotating binlog file. It is
called just after MYSQL_BIN_LOG::m_binlog_file is opened.
@retval false Succeeds.
@retval true Error happens.
*/
bool open_binlog_file();
/**
Create mysql.duckdb_binlog_position table and initialize if it is not
created and duckdb mode is on.
*/
bool duckdb_binlog_init();
/**
Commit a transaction on duckdb server.
@param[in] thd THD object of the session.
*/
bool duckdb_commit(THD *thd);
/**
Truncate binlog file to the position stored in mysql.duckdb_binlog_position
if it is necessary.
*/
bool duckdb_recover(const char* log_name);
/**
When a new binlog is created, duckdb_binlog_position's position should
be updated to the position of the new binlog file.
*/
bool duckdb_binlog_rotate();
private:
Binlog_ext &operator=(const Binlog_ext &) = delete;
Binlog_ext(const Binlog_ext &) = delete;
Binlog_ext(Binlog_ext &&) = delete;
/** The suffix number of current binlog file. It is stored in big-endian. */
uint m_log_num;
/** Points to the log name without path */
char *m_log_name;
};
extern Binlog_ext mysql_bin_log_ext;
void trx_cache_write_event(THD *thd, Log_event *event);
#endif // BINLOG_EXT_INCLUDED