Re: serialization errors when inserting new records

Ralph van Etten wrote:
> Hoi,
>
> I searched the archives but couldn't find an answer to this:
>
> I have a table (simplyfied)
>
> CREATE TABLE test (
> id INT PRIMARY KEY,
> name VARCHAR(250)
> );
>
> I insert records with
>
> INSERT INTO test (id, name)
> SELECT COALESCE(MAX(id)+1, 1), 'name' FROM test
>
> Ofcourse this gives problems when two clients are inserting a record at
> the same time. (duplicate primary keys) But, i can't use a sequence in my
> application (the pk consists of more than just a sequence)
>

It's not clear why you can't use a serial as the primary key or as part
of the primary key. From your example it looks like you are trying to do
exactly that.

What does your *real* primary key consist of?

Cheers,
Gary.