Re: Autocommit off - commits/rollbacks

Hello.
On 03/14/2011 12:24, Vogt, Michael wrote:
> I have a question, using the autocommit off option in postgres.
>
> As starting position I use a table called xxx.configuration using a
> unique id constraint.
>
> Why does postgres rollback the whole transaction after an error? I
> compared the behavior with oracle/hsql - those dbms commit whats
> possible. To illustrate my question, here are some examples:
....
AFAIK, sqlplus uses savepoints behind the scene. So, you can do
something like this:

 > create table t1 (i int unique);
CREATE TABLE
 > begin;
BEGIN
*> insert into t1 values(1);
INSERT 0 1
*> savepoint s1;
SAVEPOINT
*> insert into t1 values(2);
INSERT 0 1
*> savepoint s2;
SAVEPOINT
*> insert into t1 values(2);
ERROR:  duplicate key value violates unique constraint "t1_i_key"
!> ROLLBACK TO SAVEPOINT s2;
ROLLBACK
*> commit;
COMMIT

Or, you can just do:
 > \set ON_ERROR_ROLLBACK on


--
Best regards,
Alexander Pyhalov,
system administrator of Computer Center of Southern Federal University