On Tue, 2022-10-18 at 17:33 -0400, Tom Lane wrote:
> Bryn Llewellyn <bryn@yugabyte.com> writes:
> > xof@thebuild.com wrote:
> > > You can commit in a loop, but not in BEGIN / END block that has an exception handler: that creates a
subtransactionfor the duration of the BEGIN / END.
>
> > This surprised me when I first started to use PG (after all those years
> > with ORCL).
>
> Really? BEGIN with an exception block is a subtransaction because it's
> defined to roll back to the database state as of the start of the block
> if an exception occurs. COMMIT in the middle fundamentally conflicts
> with that, I should think. Does Oracle interpret that differently?
Looks like Oracle doesn't care much about that:
SQL> CREATE TABLE mytab (id integer CHECK (id > 0));
Table created.
SQL> CREATE PROCEDURE committest IS
2 BEGIN
3 INSERT INTO mytab VALUES (42);
4 COMMIT;
5 INSERT INTO mytab VALUES (-42);
6 EXCEPTION
7 WHEN OTHERS THEN
8 NULL;
9 END;
10 /
Procedure created.
SQL> CALL committest();
Call completed.
SQL> SELECT * FROM mytab;
ID
----------
42
I looks like Oracle allows you to randomly interfere with its transaction handling.
If you run commit and then enter an exception handler, it simply doesn't rollback.
Yours,
Laurenz Albe
