# ulong session SET @start_global_value = @@global.log_slow_rate_limit; # # exists as global only # select @@global.log_slow_rate_limit; select @@session.log_slow_rate_limit; show global variables like 'log_slow_rate_limit'; show session variables like 'log_slow_rate_limit'; select * from information_schema.global_variables where variable_name='log_slow_rate_limit'; select * from information_schema.session_variables where variable_name='log_slow_rate_limit'; # # show that it's writable # set global log_slow_rate_limit=10; select @@global.log_slow_rate_limit; set session log_slow_rate_limit=10; select @@session.log_slow_rate_limit; # # incorrect types # --error ER_WRONG_TYPE_FOR_VAR set global log_slow_rate_limit=1.1; --error ER_WRONG_TYPE_FOR_VAR set session log_slow_rate_limit=1e1; --error ER_WRONG_TYPE_FOR_VAR set global log_slow_rate_limit="foo"; # # min/max values, block size # set global log_slow_rate_limit=0; select @@global.log_slow_rate_limit; set session log_slow_rate_limit=cast(-1 as unsigned int); select @@session.log_slow_rate_limit; SET @@global.log_slow_rate_limit = @start_global_value;