connect  slave,127.0.0.1,root,,,$SERVER_MYPORT_3;
change master 'abc' to relay_log_file='';
ERROR HY000: Failed initializing relay log position: Could not find target log during relay log initialization
change master 'abc2' to master_host='';
ERROR HY000: Incorrect arguments to MASTER_HOST
change master 'master1' to 
master_port=MYPORT_1, 
master_host='127.0.0.1', 
master_user='root';
start slave 'master1';
set default_master_connection = 'master1';
include/wait_for_slave_to_start.inc
connect  master1,127.0.0.1,root,,,$SERVER_MYPORT_1;
connection slave;
#
# Checking SHOW SLAVE 'master1' STATUS
#
Master_Port = 'MYPORT_1'
Relay_Log_File = 'mysqld-relay-bin-master1.000002'
Slave_IO_Running = 'Yes'
Slave_SQL_Running = 'Yes'
Last_Errno = '0'
Last_SQL_Errno = '0'
#
# Checking SHOW SLAVE STATUS
#
Master_Port = 'MYPORT_1'
Relay_Log_File = 'mysqld-relay-bin-master1.000002'
Slave_IO_Running = 'Yes'
Slave_SQL_Running = 'Yes'
Last_Errno = '0'
Last_SQL_Errno = '0'
#
# Checking SHOW ALL SLAVES STATUS
#
Connection_name = 'master1'
Master_Port = 'MYPORT_1'
Relay_Log_File = 'mysqld-relay-bin-master1.000002'
Slave_IO_Running = 'Yes'
Slave_SQL_Running = 'Yes'
Last_Errno = '0'
Last_SQL_Errno = '0'
Slave_heartbeat_period = '60.000'
#
connection master1;
drop database if exists db1;
create database db1;
use db1;
create table t1 (i int auto_increment, f1 varchar(16), primary key pk (i,f1)) engine=MyISAM;
Warnings:
Warning	1280	Name 'pk' ignored for PRIMARY key.
insert into t1 (f1) values ('one'),('two');
connection slave;
select * from db1.t1;
i	f1
1	one
2	two
# List of relay log files in the datadir
mysqld-relay-bin-master1.000001
mysqld-relay-bin-master1.000002
mysqld-relay-bin-master1.index
include/show_events.inc
Log_name	Pos	Event_type	Server_id	End_log_pos	Info
mysqld-relay-bin-master1.000001	#	Format_desc	#	#	SERVER_VERSION, BINLOG_VERSION
mysqld-relay-bin-master1.000001	#	Rotate	#	#	mysqld-relay-bin-master1.000002;pos=4
include/show_events.inc
Log_name	Pos	Event_type	Server_id	End_log_pos	Info
mysqld-relay-bin-master1.000002	#	Format_desc	#	#	SERVER_VERSION, BINLOG_VERSION
mysqld-relay-bin-master1.000002	#	Rotate	#	#	master-bin.000001;pos=POS
mysqld-relay-bin-master1.000002	#	Format_desc	#	#	SERVER_VERSION, BINLOG_VERSION
mysqld-relay-bin-master1.000002	#	Gtid_list	#	#	[]
mysqld-relay-bin-master1.000002	#	Binlog_checkpoint	#	#	master-bin.000001
mysqld-relay-bin-master1.000002	#	Gtid	#	#	GTID #-#-#
mysqld-relay-bin-master1.000002	#	Query	#	#	drop database if exists db1
mysqld-relay-bin-master1.000002	#	Gtid	#	#	GTID #-#-#
mysqld-relay-bin-master1.000002	#	Query	#	#	create database db1
mysqld-relay-bin-master1.000002	#	Gtid	#	#	GTID #-#-#
mysqld-relay-bin-master1.000002	#	Query	#	#	use `db1`; create table t1 (i int auto_increment, f1 varchar(16), primary key pk (i,f1)) engine=MyISAM
mysqld-relay-bin-master1.000002	#	Gtid	#	#	BEGIN GTID #-#-#
mysqld-relay-bin-master1.000002	#	Intvar	#	#	INSERT_ID=1
mysqld-relay-bin-master1.000002	#	Query	#	#	use `db1`; insert into t1 (f1) values ('one'),('two')
mysqld-relay-bin-master1.000002	#	Query	#	#	COMMIT
change master 'master1' to
master_port=MYPORT_2,
master_host='127.0.0.1',
master_user='root';
ERROR HY000: This operation cannot be performed as you have a running slave 'master1'; run STOP SLAVE 'master1' first
change master to
master_port=MYPORT_2,
master_host='127.0.0.1',
master_user='root';
ERROR HY000: This operation cannot be performed as you have a running slave 'master1'; run STOP SLAVE 'master1' first
change master 'master2' to
master_port=MYPORT_1,
master_host='127.0.0.1',
master_user='root';
ERROR HY000: Connection 'master2' conflicts with existing connection 'master1'
set default_master_connection = '';
change master to
master_port=MYPORT_2,
master_host='127.0.0.1',
master_user='root',
master_use_gtid=no;
start slave;
include/wait_for_slave_to_start.inc
#
# Checking SHOW ALL SLAVES STATUS
#
Connection_name = ''
Connection_name = 'master1'
Master_Port = 'MYPORT_2'
Master_Port = 'MYPORT_1'
Relay_Log_File = 'mysqld-relay-bin.000002'
Relay_Log_File = 'mysqld-relay-bin-master1.000002'
Slave_IO_Running = 'Yes'
Slave_IO_Running = 'Yes'
Slave_SQL_Running = 'Yes'
Slave_SQL_Running = 'Yes'
Last_Errno = '0'
Last_Errno = '0'
Last_SQL_Errno = '0'
Last_SQL_Errno = '0'
Slave_heartbeat_period = '60.000'
Slave_heartbeat_period = '60.000'
#
connection master1;
insert into t1 (f1) values ('three');
connect  master2,127.0.0.1,root,,,$SERVER_MYPORT_2;
drop database if exists db2;
create database db2;
use db2;
create table t1 (pk int auto_increment primary key, f1 int) engine=InnoDB;
begin;
insert into t1 (f1) values (1),(2);
connection slave;
connection master2;
connection slave;
select * from db1.t1;
i	f1
1	one
2	two
3	three
select * from db2.t1;
pk	f1
connection master2;
commit;
connection slave;
select * from db2.t1;
pk	f1
1	1
2	2
connection master1;
flush logs;
connection slave;
connection master1;
purge binary logs to 'master-bin.000002';
show binary logs;
Log_name	File_size
master-bin.000002	filesize
insert into t1 (f1) values ('four');
create table db1.t3 (f1 int) engine=InnoDB;
connection slave;
#
# Checking SHOW ALL SLAVES STATUS
#
Connection_name = ''
Connection_name = 'master1'
Master_Port = 'MYPORT_2'
Master_Port = 'MYPORT_1'
Relay_Log_File = 'mysqld-relay-bin.000002'
Relay_Log_File = 'mysqld-relay-bin-master1.000004'
Slave_IO_Running = 'Yes'
Slave_IO_Running = 'Yes'
Slave_SQL_Running = 'Yes'
Slave_SQL_Running = 'Yes'
Last_Errno = '0'
Last_Errno = '0'
Last_SQL_Errno = '0'
Last_SQL_Errno = '0'
Slave_heartbeat_period = '60.000'
Slave_heartbeat_period = '60.000'
#
#
# MDEV:16437: merge 5.7 P_S replication instrumentation and tables
#
SELECT * FROM performance_schema.replication_applier_status_by_coordinator;
CHANNEL_NAME	master1
THREAD_ID	#
SERVICE_STATE	ON
LAST_ERROR_NUMBER	0
LAST_ERROR_MESSAGE	
LAST_ERROR_TIMESTAMP	0000-00-00 00:00:00
LAST_SEEN_TRANSACTION	0-1-7
LAST_TRANS_RETRY_COUNT	0
CHANNEL_NAME	
THREAD_ID	#
SERVICE_STATE	ON
LAST_ERROR_NUMBER	0
LAST_ERROR_MESSAGE	
LAST_ERROR_TIMESTAMP	0000-00-00 00:00:00
LAST_SEEN_TRANSACTION	0-2-4
LAST_TRANS_RETRY_COUNT	0
select * from db1.t1;
i	f1
1	one
2	two
3	three
4	four
include/show_events.inc
Log_name	Pos	Event_type	Server_id	End_log_pos	Info
mysqld-relay-bin.000001	#	Format_desc	#	#	SERVER_VERSION, BINLOG_VERSION
mysqld-relay-bin.000001	#	Rotate	#	#	mysqld-relay-bin.000002;pos=4
include/show_events.inc
Log_name	Pos	Event_type	Server_id	End_log_pos	Info
mysqld-relay-bin.000002	#	Format_desc	#	#	SERVER_VERSION, BINLOG_VERSION
mysqld-relay-bin.000002	#	Rotate	#	#	master-bin.000001;pos=POS
mysqld-relay-bin.000002	#	Format_desc	#	#	SERVER_VERSION, BINLOG_VERSION
mysqld-relay-bin.000002	#	Gtid_list	#	#	[]
mysqld-relay-bin.000002	#	Binlog_checkpoint	#	#	master-bin.000001
mysqld-relay-bin.000002	#	Gtid	#	#	GTID #-#-#
mysqld-relay-bin.000002	#	Query	#	#	drop database if exists db2
mysqld-relay-bin.000002	#	Gtid	#	#	GTID #-#-#
mysqld-relay-bin.000002	#	Query	#	#	create database db2
mysqld-relay-bin.000002	#	Gtid	#	#	GTID #-#-#
mysqld-relay-bin.000002	#	Query	#	#	use `db2`; create table t1 (pk int auto_increment primary key, f1 int) engine=InnoDB
mysqld-relay-bin.000002	#	Gtid	#	#	BEGIN GTID #-#-#
mysqld-relay-bin.000002	#	Intvar	#	#	INSERT_ID=1
mysqld-relay-bin.000002	#	Query	#	#	use `db2`; insert into t1 (f1) values (1),(2)
mysqld-relay-bin.000002	#	Xid	#	#	COMMIT /* XID */
disconnect slave;
connect  slave,127.0.0.1,root,,,$SERVER_MYPORT_3;
stop slave io_thread;
show status like 'Slave_running';
Variable_name	Value
Slave_running	OFF
set default_master_connection = 'master1';
show status like 'Slave_running';
Variable_name	Value
Slave_running	ON
drop database db1;
drop database db2;
include/reset_master_slave.inc
disconnect slave;
connection master1;
drop database db1;
include/reset_master_slave.inc
disconnect master1;
connection master2;
drop database db2;
include/reset_master_slave.inc
disconnect master2;