Re: Very worried about this

On Thu, 2005-03-24 at 15:21, Kris Kiger wrote:
> I have a table that looks like this:
>
> Table "public.hd"
> Column | Type
> | Modifiers
> -------------------+-----------------------------+-------------------------------------------------------------------------
> d_id | integer | not null default
> nextval('public.hd_d_id_seq'::text)
> h_id | integer | not null
> src | text |
> p_q | integer | not null default 1
> c_id | integer | not null
> insert_time | timestamp without time zone | default now()
> Indexes:
> "hd_pkey" PRIMARY KEY, btree (d_id)
> "hd_idx" btree (h_id, c_id)
>
>
> _Log output:_
>
> [2005-03-24 15:33:25 EST - 13882 - dbname - 4052774] LOG: statement:
> INSERT INTO hd (c_id, h_id, p_q) VALUES ((SELECT c_id FROM c WHERE e_id
> = 'tester1'), (SELECT h_id FROM h JOIN c USING (c_id) WHERE e_id =
> 'tester1' AND h.active AND NOT p_c),10);
>
> [2005-03-24 15:33:25 EST - 13882 - dbname - 4052774] ERROR: duplicate
> key violates unique constraint "hd_pkey"
>
>
> These inserts are being executed ever 1.5 seconds on this database.
> This error does not happen often and appears to happen randomly. No
> other inserts are being executed on this table except this one. From
> our current tests 99% of the inserts go through, with the exception of
> these few. Honestly, I don't see how this could be caused from
> something on my end. The primary key value is being determined by a
> default, so everything should be handled within the database. I'm using
> postgres 8.0.1. Any ideas?

Are you sure someone hasn't been messing with your sequence some how?
That's the only way I've seen these kinds of things happen before.