'#---------------------BS_STVARS_015_01----------------------#' SELECT COUNT(@@GLOBAL.have_query_cache); COUNT(@@GLOBAL.have_query_cache) 1 1 Expected '#---------------------BS_STVARS_015_02----------------------#' SET @@GLOBAL.have_query_cache=1; ERROR HY000: Variable 'have_query_cache' is a read only variable Expected error 'Read only variable' SELECT COUNT(@@GLOBAL.have_query_cache); COUNT(@@GLOBAL.have_query_cache) 1 1 Expected '#---------------------BS_STVARS_015_03----------------------#' SELECT @@GLOBAL.have_query_cache = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='have_query_cache'; @@GLOBAL.have_query_cache = VARIABLE_VALUE 1 1 Expected SELECT COUNT(@@GLOBAL.have_query_cache); COUNT(@@GLOBAL.have_query_cache) 1 1 Expected SELECT COUNT(VARIABLE_VALUE) FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='have_query_cache'; COUNT(VARIABLE_VALUE) 1 1 Expected '#---------------------BS_STVARS_015_04----------------------#' SELECT @@have_query_cache = @@GLOBAL.have_query_cache; @@have_query_cache = @@GLOBAL.have_query_cache 1 1 Expected '#---------------------BS_STVARS_015_05----------------------#' SELECT COUNT(@@have_query_cache); COUNT(@@have_query_cache) 1 1 Expected SELECT COUNT(@@local.have_query_cache); ERROR HY000: Variable 'have_query_cache' is a GLOBAL variable Expected error 'Variable is a GLOBAL variable' SELECT COUNT(@@SESSION.have_query_cache); ERROR HY000: Variable 'have_query_cache' is a GLOBAL variable Expected error 'Variable is a GLOBAL variable' SELECT COUNT(@@GLOBAL.have_query_cache); COUNT(@@GLOBAL.have_query_cache) 1 1 Expected SELECT have_query_cache = @@SESSION.have_query_cache; ERROR 42S22: Unknown column 'have_query_cache' in 'field list' Expected error 'Readonly variable'