Обсуждение: Cannot insert a duplicate key into unique index

Hi,


I get the following error when I try to insert into the table fees, even
when the primary and unique key are serial:

Warning: PostgreSQL query failed: ERROR: Cannot insert a duplicate key
into unique index fee_uk


INSERT INTO fees (registrar_name) VALUES ('blah');


Table 'fees'

     Attribute      |     Type      |                   Modifier

--------------------+---------------+-----------------------------------------------
 fee_id             | numeric(12,0) | not null default
nextval('general_seq'::text)
 registrar_name     | varchar(30)   | not null

Indices: fee_pk,
         fee_uk


I don't understand why I get this error when the fee_id column is serial
by default.  How can I fix this error?  And, how can I display what
value "nextval('general_seq'::text)" returns?

Thanks in advance,
Adelaide

Dear Adelaide  ,

>Warning: PostgreSQL query failed: ERROR: Cannot insert a duplicate key
>into unique index fee_uk
>
>
Check the max value in data base for the same index key and then check if
the max value agree with the sequence .
do some thing like
<code>
select max(fees.fee_id);
then
select nextval('general_seq'::text);
</code>
on psql command prompt
Now if the max value of  fees.fee_id
is greater than what  nextval returns
then this sequence has to be fixed

Have you recently done an dump restore ?

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Vishal Kashyap
Director / Lead Developer,
Sai Hertz And Control Systems Pvt Ltd,
http://saihertz.rediffblogs.com
Jabber IM: vishalkashyap@jabber.org
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