Audit as Autonomous Transaction : Autonomous Transaction « PL SQL Statements « Oracle PL/SQL Tutorial






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>
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>
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>
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>
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
JAVA2S     09-JUN-07

         2
update
update of emp.salary
JAVA2S     09-JUN-07

         3
update
update of emp.salary
JAVA2S     09-JUN-07

         4
update
update of emp.salary
JAVA2S     09-JUN-07

         5
update
update of emp.salary
JAVA2S     09-JUN-07

         6
update
update of emp.salary
JAVA2S     09-JUN-07

         7
update
update of emp.salary
JAVA2S     09-JUN-07

         8
update
update of emp.salary
JAVA2S     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>
SQL>
SQL>
SQL> -- clean the table
SQL> drop table Employee
  2  /

Table dropped.

SQL>
SQL>
SQL>








22.21.Autonomous Transaction
22.21.1.Autonomous Transactions
22.21.2.Audit as Autonomous Transaction
22.21.3.Non-Working p_log_audit
22.21.4.Mark an anonymous block 'pragma autonomous_transaction'
22.21.5.'pragma autonomous_transaction' package member procedure
22.21.6.Commit an Insert statement in a 'pragma autonomous_transaction' procedure