Query related with nested transaction

Question

Friends,
Today i've been encountered with problem in running a nested transaction and i guess the sample script given below illustrates well abt the same ...
I've a proc "sp_proc1" as follows
CREATE OR REPLACE PROCEDURE sp_proc1
AS
     val INT;     
     BEGIN      
          val := 1;     
          BEGIN SAVEPOINT proc1;                         
          INSERT INTO tab1 VALUES ( 1 , 2 );
          sp_proc2(val);
          ROLLBACK TO SAVEPOINT proc1;               
     END;
and the called proc is like this
CREATE OR REPLACE PROCEDURE sp_proc2
     val1 IN      INT DEFAULT NULL
AS
     BEGIN SAVEPOINT proc2;          
     UPDATE tab1 SET     col1 = 5;
     IF val1 = 0 THEN
     BEGIN
          ROLLBACK TO SAVEPOINT proc2;
     END;
     ELSE
     BEGIN
COMMIT;
     END;
     END IF;
     END;
and when i exec the proc1
ORA-01086: savepoint 'PROC1' never established
Any suggestions on this .....

Answer 1

Autonomous transactions are independent units of work and should be completely
committed of rolled back before returning from an autonomous program unit.
So anything you do in the calling procedure doesn't affect the autonomous one:
SQL> create table t (id number);
Table created.
SQL> create or replace procedure auto_01
  2  is
  3   pragma autonomous_transaction;
  4  begin
  5   insert into t values(1);
  6   savepoint a;
  7   insert into t values(2);
  8   rollback to savepoint a;
  9   commit;
10  end;
11  /
Procedure created.
SQL> begin
  2   insert into t values(3);
  3   savepoint a;
  4   auto_01;
  5   insert into t values(4);
  6   rollback to savepoint a;
  7   commit;
  8  end;
  9  /
PL/SQL procedure successfully completed.
SQL> select * from t;
        ID
         3
         1Rgds.