'#---------------------BS_STVARS_018_01----------------------#' SELECT COUNT(@@GLOBAL.have_symlink); COUNT(@@GLOBAL.have_symlink) 1 1 Expected '#---------------------BS_STVARS_018_02----------------------#' SET @@GLOBAL.have_symlink=1; ERROR HY000: Variable 'have_symlink' is a read only variable Expected error 'Read only variable' SELECT COUNT(@@GLOBAL.have_symlink); COUNT(@@GLOBAL.have_symlink) 1 1 Expected '#---------------------BS_STVARS_018_03----------------------#' SELECT @@GLOBAL.have_symlink = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='have_symlink'; @@GLOBAL.have_symlink = VARIABLE_VALUE 1 1 Expected SELECT COUNT(@@GLOBAL.have_symlink); COUNT(@@GLOBAL.have_symlink) 1 1 Expected SELECT COUNT(VARIABLE_VALUE) FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='have_symlink'; COUNT(VARIABLE_VALUE) 1 1 Expected '#---------------------BS_STVARS_018_04----------------------#' SELECT @@have_symlink = @@GLOBAL.have_symlink; @@have_symlink = @@GLOBAL.have_symlink 1 1 Expected '#---------------------BS_STVARS_018_05----------------------#' SELECT COUNT(@@have_symlink); COUNT(@@have_symlink) 1 1 Expected SELECT COUNT(@@local.have_symlink); ERROR HY000: Variable 'have_symlink' is a GLOBAL variable Expected error 'Variable is a GLOBAL variable' SELECT COUNT(@@SESSION.have_symlink); ERROR HY000: Variable 'have_symlink' is a GLOBAL variable Expected error 'Variable is a GLOBAL variable' SELECT COUNT(@@GLOBAL.have_symlink); COUNT(@@GLOBAL.have_symlink) 1 1 Expected SELECT have_symlink = @@SESSION.have_symlink; ERROR 42S22: Unknown column 'have_symlink' in 'field list' Expected error 'Readonly variable'