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include/master-slave.inc
Warnings:
Note #### Sending passwords in plain text without SSL/TLS is extremely insecure.
Note #### Storing MySQL user name or password information in the master info repository is not secure and is therefore not recommended. Please consider using the USER and PASSWORD connection options for START SLAVE; see the 'START SLAVE Syntax' in the MySQL Manual for more information.
[connection master]
CALL mtr.add_suppression("Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT");
create table t1(n int);
insert into t1 values(get_lock("lock",2));
select get_lock("lock",2);
get_lock("lock",2)
1
select release_lock("lock");
release_lock("lock")
1
include/sync_slave_sql_with_master.inc
select get_lock("lock",3);
get_lock("lock",3)
1
select * from t1;
n
1
select is_free_lock("lock"), is_used_lock("lock") = connection_id();
is_free_lock("lock") is_used_lock("lock") = connection_id()
0 1
explain extended select is_free_lock("lock"), is_used_lock("lock");
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select is_free_lock('lock') AS `is_free_lock("lock")`,is_used_lock('lock') AS `is_used_lock("lock")`
select is_free_lock("lock2");
is_free_lock("lock2")
1
drop table t1;
include/sync_slave_sql_with_master.inc
include/rpl_end.inc