1SELECT @@GLOBAL.have_backup_locks="YES"; 2@@GLOBAL.have_backup_locks="YES" 31 4SELECT @@SESSION.have_backup_locks; 5ERROR HY000: Variable 'have_backup_locks' is a GLOBAL variable 6SHOW GLOBAL VARIABLES LIKE 'have_backup_locks'; 7Variable_name Value 8have_backup_locks YES 9SHOW SESSION VARIABLES LIKE 'have_backup_locks'; 10Variable_name Value 11have_backup_locks YES 12