oracle通过触发器实现登录登出日志记录

-----删除表---
drop table userlogininfo
--创建登录登出记录信息表
create table userlogininfo
(
infoid int primary key not null,
USERNAME VARCHAR2(30),
TERMINAL VARCHAR2(50),
IPADRESS VARCHAR2(20),
OSUSER VARCHAR2(30),
MACHINE VARCHAR2(64),
PROGRAM VARCHAR2(64),
SID NUMBER,
SERIAL# NUMBER,
AUSID NUMBER,
LOGINTIME DATE default sysdate,
LOGout_TIME date
)
---删除序列---
DROP SEQUENCE seq_userlogininfo
---创建自动增长序列--
CREATE SEQUENCE seq_userlogininfo
INCREMENT BY 1  -- 每次加几个
START WITH 1    -- 从1开始计数
NOMAXVALUE      -- 不设置最大值
NOCYCLE         -- 一直累加，不循环
CACHE 10;
-------
-----删除触发器----
DROP TRIGGER TR_LOGIN_RECORD
------创建登录触发器---
CREATE OR REPLACE TRIGGER TR_LOGIN_RECORD
AFTER logon ON DATABASE
DECLARE
mtSession v$session%ROWTYPE;
CURSOR cSession(iiQuerySid IN NUMBER) IS
SELECT * FROM v$session
WHERE nvl(osuser,'x') <> 'SYSTEM'   and type <> 'BACKGROUND' and audsid = iiQuerySid;
BEGIN
OPEN cSession(userenv('SESSIONID'));
FETCH cSession INTO mtSession;
IF cSession%FOUND THEN
INSERT INTO userlogininfo(infoid,username,logintime,terminal,ipadress,osuser,machine,
program,sid,serial#,ausid)
VALUES(seq_userlogininfo.nextval,USER,SYSDATE,mtSession.Terminal,
SYS_CONTEXT ('USERENV','IP_ADDRESS'),mtSession.Osuser,
mtSession.Machine,mtSession.Program,mtSession.Sid,mtSession.Serial#,userenv('SESSIONID'));
END IF;
CLOSE cSession;
EXCEPTION
WHEN OTHERS THEN
raise;
end;

-----创建登出更新登出时间触发器---
create or replace trigger TR_LOGOFF_RECORD
before LOGOFF ON DATABASE
DECLARE
mtSession v$session%ROWTYPE;
CURSOR cSession(iiQuerySid IN NUMBER) IS
SELECT * FROM v$session where
nvl(osuser,'x') <> 'SYSTEM'   and type <> 'BACKGROUND' and audsid = iiQuerySid;
BEGIN
OPEN cSession(userenv('SESSIONID'));
FETCH cSession INTO mtSession;
IF cSession%FOUND THEN
UPDATE userlogininfo SET LOGOUT_TIME=SYSDATE WHERE sid=mtSession.Sid AND serial#=mtSession.Serial#;
END IF;
CLOSE cSession;
EXCEPTION
WHEN OTHERS THEN
raise;
END;