'#---------------------BS_STVARS_019_01----------------------#'
SELECT COUNT(@@GLOBAL.hostname);
COUNT(@@GLOBAL.hostname)
1
1 Expected
'#---------------------BS_STVARS_019_02----------------------#'
SET @@GLOBAL.hostname=1;
ERROR HY000: Variable 'hostname' is a read only variable
Expected error 'Read only variable'
SELECT COUNT(@@GLOBAL.hostname);
COUNT(@@GLOBAL.hostname)
1
1 Expected
'#---------------------BS_STVARS_019_03----------------------#'
SELECT @@GLOBAL.hostname = VARIABLE_VALUE
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
WHERE VARIABLE_NAME='hostname';
@@GLOBAL.hostname = VARIABLE_VALUE
1
1 Expected
SELECT COUNT(@@GLOBAL.hostname);
COUNT(@@GLOBAL.hostname)
1
1 Expected
SELECT COUNT(VARIABLE_VALUE)
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 
WHERE VARIABLE_NAME='hostname';
COUNT(VARIABLE_VALUE)
1
1 Expected
'#---------------------BS_STVARS_019_04----------------------#'
SELECT @@hostname = @@GLOBAL.hostname;
@@hostname = @@GLOBAL.hostname
1
1 Expected
'#---------------------BS_STVARS_019_05----------------------#'
SELECT COUNT(@@hostname);
COUNT(@@hostname)
1
1 Expected
SELECT COUNT(@@local.hostname);
ERROR HY000: Variable 'hostname' is a GLOBAL variable
Expected error 'Variable is a GLOBAL variable'
SELECT COUNT(@@SESSION.hostname);
ERROR HY000: Variable 'hostname' is a GLOBAL variable
Expected error 'Variable is a GLOBAL variable'
SELECT COUNT(@@GLOBAL.hostname);
COUNT(@@GLOBAL.hostname)
1
1 Expected
SELECT hostname = @@SESSION.hostname;
ERROR 42S22: Unknown column 'hostname' in 'field list'
Expected error 'Readonly variable'