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MASTER_GTID_WAIT() is similar to MASTER_POS_WAIT(), but works with a GTID position rather than an old-style filename/offset. @@LAST_GTID gives the GTID assigned to the last transaction written into the binlog. Together, the two can be used by applications to obtain the GTID of an update on the master, and then do a MASTER_GTID_WAIT() for that position on any read slave where it is important to get results that are caught up with the master at least to the point of the update. The implementation of MASTER_GTID_WAIT() is implemented in a way that tries to minimise the performance impact on the SQL threads, even in the presense of many waiters on single GTID positions (as from @@LAST_GTID).
84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef SQL_REPL_INCLUDED
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#define SQL_REPL_INCLUDED
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#include "rpl_filter.h"
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#ifdef HAVE_REPLICATION
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#include "slave.h"
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typedef struct st_slave_info
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{
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uint32 server_id;
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uint32 rpl_recovery_rank, master_id;
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char host[HOSTNAME_LENGTH*SYSTEM_CHARSET_MBMAXLEN+1];
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char user[USERNAME_LENGTH+1];
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char password[MAX_PASSWORD_LENGTH*SYSTEM_CHARSET_MBMAXLEN+1];
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uint16 port;
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THD* thd;
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} SLAVE_INFO;
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struct slave_connection_state;
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extern my_bool opt_show_slave_auth_info;
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extern char *master_host, *master_info_file;
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extern bool server_id_supplied;
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extern int max_binlog_dump_events;
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extern my_bool opt_sporadic_binlog_dump_fail;
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int start_slave(THD* thd, Master_info* mi, bool net_report);
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int stop_slave(THD* thd, Master_info* mi, bool net_report);
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bool change_master(THD* thd, Master_info* mi, bool *master_info_added);
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bool mysql_show_binlog_events(THD* thd);
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int reset_slave(THD *thd, Master_info* mi);
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int reset_master(THD* thd, rpl_gtid *init_state, uint32 init_state_len);
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bool purge_master_logs(THD* thd, const char* to_log);
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bool purge_master_logs_before_date(THD* thd, time_t purge_time);
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bool log_in_use(const char* log_name);
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void adjust_linfo_offsets(my_off_t purge_offset);
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bool show_binlogs(THD* thd);
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extern int init_master_info(Master_info* mi);
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void kill_zombie_dump_threads(uint32 slave_server_id);
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int check_binlog_magic(IO_CACHE* log, const char** errmsg);
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typedef struct st_load_file_info
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{
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THD* thd;
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my_off_t last_pos_in_file;
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bool wrote_create_file, log_delayed;
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} LOAD_FILE_INFO;
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int log_loaded_block(IO_CACHE* file);
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int init_replication_sys_vars();
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void mysql_binlog_send(THD* thd, char* log_ident, my_off_t pos, ushort flags);
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extern PSI_mutex_key key_LOCK_slave_state, key_LOCK_binlog_state;
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void rpl_init_gtid_slave_state();
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void rpl_deinit_gtid_slave_state();
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void rpl_init_gtid_waiting();
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void rpl_deinit_gtid_waiting();
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int gtid_state_from_binlog_pos(const char *name, uint32 pos, String *out_str);
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int rpl_append_gtid_state(String *dest, bool use_binlog);
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int rpl_load_gtid_state(slave_connection_state *state, bool use_binlog);
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bool rpl_gtid_pos_check(THD *thd, char *str, size_t len);
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bool rpl_gtid_pos_update(THD *thd, char *str, size_t len);
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#endif /* HAVE_REPLICATION */
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#endif /* SQL_REPL_INCLUDED */
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