Oracle Database Triggers Complex Security Checks

a need

Prohibit inserting new employee into employee table when not working

two code

1. --触发器应用场景1：实施复制的安全性检查
2. --禁止在非工作时间插入新员工
3. /*
4. 1、周末：to_char(sysdate,'day') in ('星期六','星期日')
5. 2、上班前和下班后：to_number(to_char(sysdate,'hh24')) not between 9 and 18
6. */
7. create or replace trigger securityemp
8. before insert
9. on emp
10. begin
11. if to_char(sysdate,'day')in('星期六','星期日')or
12. to_number(to_char(sysdate,'hh24'))not between 9and18then
13. --禁止insert新员工
14. raise_application_error(-20001,'禁止在非工作时间插入新员工');
15. endif;
16. end;
17. /

Three verification

SQL> insert into emp(empno,ename,sal,deptno) values(1003,'Tome','3000',10);

insert into emp(empno,ename,sal,deptno) values(1003,'Tome','3000',10)

            *

Error on line 1:

ORA-20001: insertion of new employee during non-working hours is prohibited

ORA-06512: 在 "SCOTT.SECURITYEMP", line 5

ORA-04088: error during execution of trigger 'SCOTT.SECURITYEMP'