From: | Tomasz Myrta <jasiek(at)klaster(dot)net> |
---|---|
To: | Rudi Starcevic <rudi(at)oasis(dot)net(dot)au> |
Cc: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: Sub Select inside Check ? |
Date: | 2003-02-25 11:29:49 |
Message-ID: | 3E5B53AD.8050406@klaster.net |
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Thread: | |
Lists: | pgsql-sql |
Rudi Starcevic wrote:
> Hi,
>
> I'm trying to create this table with a Check that fails.
>
> I'm using 'Check' instead of 'References' due to poor db schema ( before
> me .. )
>
> Here is my error message:
> ERROR: cannot use subselect in CHECK constraint expression
>
> CREATE TABLE cp_retailers
> (
> ret_id serial PRIMARY KEY,
> ret_name varchar(120) NOT NULL,
> ret_address1 varchar(120),
> ret_address2 varchar(120),
> sub_id integer NOT NULL CHECK
> ( EXISTS
> ( SELECT sub_id FROM suburbs )
> )
> );
>
> I guess that say's it all - no sub select's in Check or am I on the
> wrong track ?
Postgresql 7.3 documentation:
"SQL Commands/CREATE TABLE":
...Currently, CHECK expressions cannot contain subselects nor refer to
variables other than columns of the current row...
Regards,
Tomasz Myrta
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