1SELECT @@GLOBAL.have_backup_locks="YES";
2@@GLOBAL.have_backup_locks="YES"
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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