Transactions within/across procedures

Question

Hi,
I am new to oracle. I would like to know if a savepoint can be started at a higher level procedure, say proc_nestedlevel_0, and the same transaction continue down through lower level procedures proc_nestedlevel_1...2 . . .3 . . .proc_nestedlevel_n? The lower level procedures have dml statements. After processing the lower level procedures I try and rollback in the proc_nestedlevel_0 but the savepoint is no longer recognized and an exception is thrown. If it is possible to do this, could someone provide me an example as to how? I am finding in order for transaction technology to work in oracle procedures, you have to set a savepoint and have all of the DML statements in the same procedure. Only then will any savepoints be "recognized" as being set.
Any help is appreciated.
Thanks.

Answer 1

If it is possible to do this, could someone provide me an example as to how?
SQL> create or replace procedure p_2th_level
  2  is
  3  begin
  4   insert into t values(3);
  5   rollback to point_0;
  6  end;
  7  /
Procedure created.
SQL> create or replace procedure p_1th_level
  2  is
  3  begin
  4   insert into t values(2);
  5   p_2th_level;
  6  end;
  7  /
Procedure created.
SQL> create or replace procedure p_0th_level
  2  is
  3  begin
  4   insert into t values(1);
  5   savepoint point_0;
  6   p_1th_level;
  7  end;
  8  /
Procedure created.
SQL> select * from t;
no rows selected
SQL> exec p_0th_level
PL/SQL procedure successfully completed.
SQL> select * from t;
        ID
         1
I try and rollback in the proc_nestedlevel_0 but the savepoint is no longer
recognized and an exception is thrown. Don't you complete transaction inside "nested" procedures ? Check this:
SQL> create or replace procedure p_1th_level
  2  is
  3  begin
  4   insert into t values(2);
  5   commit;
  6   p_2th_level;
  7  end;
  8  /
Procedure created.
SQL> exec p_0th_level
BEGIN p_0th_level; END;
ERROR at line 1:
ORA-01086: savepoint 'POINT_0' never established
ORA-06512: at "SCOTT.P_2TH_LEVEL", line 5
ORA-06512: at "SCOTT.P_1TH_LEVEL", line 6
ORA-06512: at "SCOTT.P_0TH_LEVEL", line 6
ORA-06512: at line 1Rgds.