利用觸發器鎖住自己的代碼防止他人改動

create or replace trigger LockSourcebeforecreateon  SCHEMA
declare
beginif SYS_CONTEXT('USERENV','OS_USER') = '自己的機器名'thenreturn;end if;if ora_dict_obj_name in ('xxxx1_PACKAGE','xxxx2_PACKAGE')thenraise_application_error(-20001, 'Stop!!!');end if;
end LockSource;
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