Autonomous Transactions usage in PL/SQL anonymous block coding

Question

Hi,
I am trying to incorporate Autonomous Transaction for our work. I am using the tables provided below,
CREATE TABLE T1
F1 INTEGER,
F2 INTEGER
CREATE TABLE T2
F1 INTEGER,
F2 INTEGER
insert into t1(f1, f2)
values(20, 0)
insert into t2(f1, f2)
values(10, 0)
Now, when I use the code snippet given below, it is working as expected.
create or replace procedure p1 as
PRAGMA AUTONOMOUS_TRANSACTION;
begin
     update t2
     set f2 = 25
     where f1 = 10;
     commit;
end;
declare
PRAGMA AUTONOMOUS_TRANSACTION;
a integer;
begin
     update t1
     set f2 = 15
     where f1 = 20;
     p1();
     rollback;
end;
Here, updation in t2 table is commited and t1 is rolled back, it is working as
expected. I would like to achieve the same functionality through PL/SQL
anonymous block coding, to do this, I use the following code snippet,
declare
PRAGMA AUTONOMOUS_TRANSACTION;
a integer;
begin
     update t1
     set f2 = 15
     where f1 = 20;
     begin
          update t2
          set f2 = 35
          where f1 = 10;
          commit;
     end;
     rollback;
end;
Here, data in both the tables are commited, how do I change it to work as I
mentioned above like committing t2 alone, please help, thank you.
Regards,
Deva

Answer 1

Can you explain what you're trying to accomplish from a business perspective? This doesn't look like a particularly appropriate way to use autonomous transactions, so you may be causing yourself problems down the line.
That said, padders's solution does appear to work for me
SCOTT @ nx102 Local> CREATE TABLE T1
  2  (
  3  F1 INTEGER,
  4  F2 INTEGER
  5  )
  6  /
Table created.
Elapsed: 00:00:01.03
SCOTT @ nx102 Local>
SCOTT @ nx102 Local>
SCOTT @ nx102 Local> CREATE TABLE T2
  2  (
  3  F1 INTEGER,
  4  F2 INTEGER
  5  )
  6  /
Table created.
Elapsed: 00:00:00.00
SCOTT @ nx102 Local>
SCOTT @ nx102 Local> insert into t1(f1, f2)
  2  values(20, 0)
  3  /
1 row created.
Elapsed: 00:00:00.01
SCOTT @ nx102 Local>
SCOTT @ nx102 Local> insert into t2(f1, f2)
  2  values(10, 0)
  3  /
1 row created.
Elapsed: 00:00:00.01
SCOTT @ nx102 Local> commit;
Commit complete.
Elapsed: 00:00:00.01
SCOTT @ nx102 Local> DECLARE
  2     a INTEGER;
  3 
  4     PROCEDURE update_t2
  5     IS
  6        PRAGMA AUTONOMOUS_TRANSACTION;
  7     BEGIN
  8        UPDATE t2
  9           SET f2 = 35
10         WHERE f1 = 10;
11 
12        COMMIT;
13     END update_t2;
14  BEGIN
15     UPDATE t1
16        SET f2 = 15
17      WHERE f1 = 20;
18    
19     update_t2;
20 
21     ROLLBACK;
22  END;
23  /
PL/SQL procedure successfully completed.
Elapsed: 00:00:00.04Have you done something else that would cause a deadlock?
Justin