"Matthijs Melissen" <melissen(at)phil(dot)uu(dot)nl> writes:
> I am executing the following queries (id has a unique key):
> 1) begin;
> 1) delete from forum where id = 20;
> 1) insert into forum (id, name) values (20, 'test');
> 2) delete from forum where id = 20;
> 1) commit;
> The problem is that process 2 gets the message 'DELETE 0'. I would expect
> him to get the message 'DELETE 1'.
Why do you find that strange? Process 1 hasn't committed its insert yet.
regards, tom lane