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Audit as Autonomous Transaction

Handling auditing and security with autonomous transactions SQL> -- create demo table SQL> create table Employee(   2    ID                 VARCHAR2(4 BYTE)         NOT NULL,   3    First_Name         VARCHAR2(10 BYTE),   4    Last_Name          VARCHAR2(10 BYTE),   5    Start_Date         DATE,   6    End_Date           DATE,   7    Salary             Number(8,2),   8    City               VARCHAR2(10 BYTE),   9    Description        VARCHAR2(15 BYTE)  10  )  11  / Table created. SQL> SQL> -- prepare data SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)   2               values ('01','Jason',    'Martin',  to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto',  'Programmer')   3  / 1 row created. SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)   2                values('02','Alison',   'Mathews', to_date('19760321','YYYYMMDD'), to_date('19860221','YYYYMMDD'), 6661.78, 'Vancouver','Tester')   3  / 1 row created. SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)   2                values('03','James',    'Smith',   to_date('19781212','YYYYMMDD'), to_date('19900315','YYYYMMDD'), 6544.78, 'Vancouver','Tester')   3  / 1 row created. SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)   2                values('04','Celia',    'Rice',    to_date('19821024','YYYYMMDD'), to_date('19990421','YYYYMMDD'), 2344.78, 'Vancouver','Manager')   3  / 1 row created. SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary,  City,       Description)   2                values('05','Robert',   'Black',   to_date('19840115','YYYYMMDD'), to_date('19980808','YYYYMMDD'), 2334.78, 'Vancouver','Tester')   3  / 1 row created. SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)   2                values('06','Linda',    'Green',   to_date('19870730','YYYYMMDD'), to_date('19960104','YYYYMMDD'), 4322.78,'New York',  'Tester')   3  / 1 row created. SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)   2                values('07','David',    'Larry',   to_date('19901231','YYYYMMDD'), to_date('19980212','YYYYMMDD'), 7897.78,'New York',  'Manager')   3  / 1 row created. SQL> insert into Employee(ID,  First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)   2                values('08','James',    'Cat',     to_date('19960917','YYYYMMDD'), to_date('20020415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester')   3  / 1 row created. SQL> SQL> -- display data in the table SQL> select * from Employee   2  / ID   FIRST_NAME           LAST_NAME            START_DAT END_DATE      SALARY CITY       DESCRIPTION ---- -------------------- -------------------- --------- --------- ---------- ---------- --------------- 01   Jason                Martin               25-JUL-96 25-JUL-06    1234.56 Toronto    Programmer 02   Alison               Mathews              21-MAR-76 21-FEB-86    6661.78 Vancouver  Tester 03   James                Smith                12-DEC-78 15-MAR-90    6544.78 Vancouver  Tester 04   Celia                Rice                 24-OCT-82 21-APR-99    2344.78 Vancouver  Manager 05   Robert               Black                15-JAN-84 08-AUG-98    2334.78 Vancouver  Tester 06   Linda                Green                30-JUL-87 04-JAN-96    4322.78 New York   Tester 07   David                Larry                31-DEC-90 12-FEB-98    7897.78 New York   Manager 08   James                Cat                  17-SEP-96 15-APR-02    1232.78 Vancouver  Tester 8 rows selected. SQL> SQL> create sequence audit_seq   2  / Sequence created. SQL> Create table audit_emp (action_nr NUMBER,action_cd VARCHAR2(2000), descr_tx VARCHAR2(2000),user_cd VARCHAR2(10), date_dt DATE)   2  / Table created. SQL> SQL> create or replace procedure p_log_audit   2            (what_tx VARCHAR2,           descr_tx VARCHAR2,   3             who_tx VARCHAR2, when_dt DATE)   4  is   5      pragma autonomous_transaction;   6  begin   7      insert into Audit_emp   8      values(audit_seq.nextval, what_tx, descr_tx,   9             who_tx, when_dt);  10      commit;  11  end;  12  / Procedure created. SQL> SQL> create or replace trigger bu_emp   2  before update of salary on employee   3  referencing new as new old as old for each row   4  begin   5      p_log_audit ('update','update of emp.salary', user, SYSDATE);   6  end;   7  / Trigger created. SQL> SQL> update employee set salary = 10000; 8 rows updated. SQL> SQL> select * from audit_emp;  ACTION_NR ---------- ACTION_CD --------------------------------- DESCR_TX --------------------------------- USER_CD    DATE_DT ---------- ---------          1 update update of emp.salary RNTSOFT     09-JUN-07          2 update update of emp.salary RNTSOFT     09-JUN-07          3 update update of emp.salary RNTSOFT     09-JUN-07          4 update update of emp.salary RNTSOFT     09-JUN-07          5 update update of emp.salary RNTSOFT     09-JUN-07          6 update update of emp.salary RNTSOFT     09-JUN-07          7 update update of emp.salary RNTSOFT     09-JUN-07          8 update update of emp.salary RNTSOFT     09-JUN-07 8 rows selected. SQL> SQL> select * from employee; ID   FIRST_NAME           LAST_NAME            START_DAT END_DATE      SALARY CITY       DESCRIPTION ---- -------------------- -------------------- --------- --------- ---------- ---------- --------------- 01   Jason                Martin               25-JUL-96 25-JUL-06      10000 Toronto    Programmer 02   Alison               Mathews              21-MAR-76 21-FEB-86      10000 Vancouver  Tester 03   James                Smith                12-DEC-78 15-MAR-90      10000 Vancouver  Tester 04   Celia                Rice                 24-OCT-82 21-APR-99      10000 Vancouver  Manager 05   Robert               Black                15-JAN-84 08-AUG-98      10000 Vancouver  Tester 06   Linda                Green                30-JUL-87 04-JAN-96      10000 New York   Tester 07   David                Larry                31-DEC-90 12-FEB-98      10000 New York   Manager 08   James                Cat                  17-SEP-96 15-APR-02      10000 Vancouver  Tester 8 rows selected. SQL> SQL> drop table audit_emp; Table dropped. SQL> SQL> drop sequence audit_seq; Sequence dropped. SQL> SQL> -- clean the table SQL> drop table Employee   2  / Table dropped. SQL>