监控和审计 Oracle 数据库错误

这个方法在开发数据库期间可能没什么用，但是在产品环境中你可能尝试查看和跟踪数据库的错误信息。

首先我们创建一个表来存储错误信息，必须确保每个人都有访问这个表的权限

01	CREATE TABLE error_log (

02	server_error VARCHAR2(100),

03	osuser VARCHAR2(30),

04	username VARCHAR2(30),

05	machine VARCHAR2(64),

06	process VARCHAR2(24),

07	program VARCHAR2(48),

08	stmt VARCHAR2(4000),

09	msg VARCHAR2(4000),

10	date_created DATE

11

)

然后创建如下触发器，触发条件："AFTER SERVERERROR ON DATABASE":

01	CREATE OR REPLACE

02	TRIGGER error_log_trigger

03	AFTER SERVERERROR ON DATABASE

04

DECLARE

05	username_  error_log.username%TYPE;

06	osuser_    error_log.osuser%TYPE;

07	machine_   error_log.machine%TYPE;

08	process_   error_log.process%TYPE;

09	program_   error_log.program%TYPE;

10	stmt_      VARCHAR2(4000);

11	msg_       VARCHAR2(4000);

12	sql_text_  ora_name_list_t;

13

BEGIN

14

15	FOR i IN 1..NVL(ora_sql_txt(sql_text_), 0) LOOP

16	stmt_ := SUBSTR(stmt_ || sql_text_(i) ,1,4000);

17

END LOOP;

18

19	FOR i IN 1..ora_server_error_depth LOOP

20	msg_ := SUBSTR(msg_ || ora_server_error_msg(i) ,1,4000);

21

END LOOP;

22

23	SELECT osuser, username, machine, process, program

24	INTO   osuser_, username_, machine_, process_, program_

25	FROM   sys.v_$session

26	WHERE  audsid = USERENV('SESSIONID');

27

28	INSERT INTO error_log VALUES (dbms_standard.server_error(1), osuser_, username_, machine_, process_, program_, stmt_, msg_, SYSDATE);

29

END;

等一等，可能表里就有错误信息了：）