Cancel the contents of the operation. You can cancel the operations of loading and backing up the database through this node when you incorrectly perform the operations. Options: 1.nothing(-1) -indicates that no operation is performed in the system currently. 2.data(1) -indicates the operation on a database is to be cancelled. Both the loading and backup of a database can be cancelled. 3.script(2) -indicates that the operation on a script is to be cancelled. Only the loading of a script can be cancelled. The backup of a script cannot be cancelled.