Re: problem with foreign key

On 5 September 2010 22:17, Ljubomir Erdeljan <ljubomir(dot)erdeljan(at)chello(dot)at>wrote:

> hi group,
>
> trying to create foreign key:
>
> ALTER TABLE porder1 ADD CONSTRAINT order_exist
> FOREIGN KEY (docuuserid) REFERENCES trade(tradeid) ON DELETE RESTRICT;
>
> column docuuserid is integer in porder1
> column tradeid is serial in trade and belong to primary key (single
> column)
>
> getting In EMS PostgreSQL
> ERROR: insert or update on table "porder1" violates foreign key constraint
> "order_exist"
> DETAIL: Key (docuuserid)=(8415) is not present in table "trade".
>
> In PostgreSQL Code Factory
> SQL Error: ERROR: insert or update on table "porder1" violates foreign key
> constraint "order_exist"
> DETAIL: Key (docuuserid)=(8415) is not present in table "trade".
>
> postgresql 8.4.4-1 on windows 7 ultimate 64 bit standard installation
>
> I'm not able to figure out what should be a problem.
>
>
During the foreign key creation, database checks if all rows are correct,
and they are not. There is a row in the porder1 table where field docuuserid
= 8415 and there is no row in the table trader where tradeid=8415.

regards
Szymon Guz