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
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