1set @save_slave_sql_verify_checksum = @@global.slave_sql_verify_checksum;
2select @@global.slave_sql_verify_checksum  as 'must be one because of default';
3must be one because of default
41
5select @@session.slave_sql_verify_checksum  as 'no session var';
6ERROR HY000: Variable 'slave_sql_verify_checksum' is a GLOBAL variable
7set @@global.slave_sql_verify_checksum = 0;
8set @@global.slave_sql_verify_checksum = default;
9set @@global.slave_sql_verify_checksum = 2;
10ERROR 42000: Variable 'slave_sql_verify_checksum' can't be set to the value of '2'
11set @@global.slave_sql_verify_checksum = @save_slave_sql_verify_checksum;
12