Re: Problem with Subquery

On Thu, 7 Mar 2002, Marc Polatschek wrote:

> We recently changed our database system from Oracle 8i to postgreSQL. Im
> right now changing our cold fusion code and i have get this problem:
>
> select ID,
> NAME,
> WEBSITE_URL,
> (
> select count(*)
> from MAIN_PC_GAME,
> MAIN_COMPANY
> where DEVELOPER_ID = MAIN_COMPANY.ID
> or PUBLISHER_ID = MAIN_COMPANY.ID
> ) as TOTAL
> from MAIN_COMPANY
> where (
> lower(SOFTWARE_DEVELOPER)='yes'
> or lower(SOFTWARE_PUBLISHER)='yes'
> )
>
> This SQL statement isnt working with postgreSQL but it worked without
> any problems in Oracle. Postgres Error Message:
>
> Unable to identify an operator '=' for types 'character varying'
> and 'numeric'
> You will have to retype this query using an explicit cast
>
> I think postgreSQL cant handle the variable MAIN_COMPANY.ID from the
> parent Scope. Probably there is a way to mark this variable to find it
> in the caller.scope. But i dont know how.

Are you sure that both DEVELOPER_ID/PUBLISHER_ID and MAIN_COMPANY.ID are
both numeric? Is one a string?

If so, cast the numeric into an integer/float. Example

CREATE TABLE test (id numeric, str varchar(5));
INSERT INTO test VALUES (1,'1');
SELECT FROM test WHERE id=str; <- same error as you're getting
SELECT FROM test WHERE id::int=str; <- works

--

Joel BURTON | joel(at)joelburton(dot)com | joelburton.com | aim: wjoelburton
Independent Knowledge Management Consultant