cant delete row

Hi,
I have a row in a table which I cannot update/delete. I think it might be
something to do with the numeric(12,2) fields - I know during testing I
tried to insert values which were too big.
I can update other rows in the table, but if I try to update/delete this
one, I get the error
ERROR:  overflow on numeric ABS(value) >= 10^9 for field with precision 8
scale 2

[guilty admission - I think maybe the numeric(12,2) fields used to be
numeric(8,2) fields and I  increased them by messing with pg_attribute.
which could have something to do with it, although it seemed to work at the
time.  that'll teach me]

I've tried dumping/reimporting the database, vacuum/analyzing the table etc.

I'm using Postgres 7.0.2 on linux.  All the table details are below.
Thanks for any ideas!
Tamsin




test=# \d order_head

                      Table "order_head"
      Attribute      |     Type      |        Modifier
---------------------+---------------+------------------------
 order_head_id       | integer       | not null
  order_value         | numeric(12,2) | not null default 0
  order_cost          | numeric(12,2) | not null default 0
 shipping_cost       | numeric(8,2)  |

test=# select order_cost, order_value, shipping_cost from order_head where
order_head_id = 1581;
  order_cost   |  order_value  | shipping_cost
---------------+---------------+---------------
 5397499900.00 | 9714420700.00 |
(1 row)

test=# delete from order_head where order_head_id = 1581;
ERROR:  overflow on numeric ABS(value) >= 10^9 for field with precision 8
scale 2
test=#

test=# select * from pg_attribute where attname in
('order_cost','order_value','shipping_cost') and attrelid in (select oid
from pg_class where relname = 'order_head');
 attrelid |    attname    | atttypid | attdisbursion | attlen | attnum |
attnelems | attcacheoff | atttypmod | attbyval | attstorage | attisset |
attalign | attnotnull | atthasdef
----------+---------------+----------+---------------+--------+--------+----
-------+-------------+-----------+----------+------------+----------+-------
---+------------+-----------
  1145957 | order_value   |     1700 |     0.0283164 |     -1 |     15 |
0 |          -1 |    786438 | f        | p          | f        | i        |
t          | t
  1145957 | order_cost    |     1700 |     0.0283164 |     -1 |     20 |
0 |          -1 |    786438 | f        | p          | f        | i        |
t          | t
  1145957 | shipping_cost |     1700 |      0.945491 |     -1 |     23 |
0 |          -1 |    524294 | f        | p          | f        | i        |
f          | f
(3 rows)