Re: CHECK clause doesn't work with CASE clause

On Thursday 27 Jun 2002 10:52 am, Jörg Holetschek wrote:
> Hi folks,
>
> I have a problem with a CHECK clause that doesn't seem to work properly.

>                      WHEN ((focus <> NULL) AND (epilepsy_class = 'f')) THEN
>                      WHEN ((focus <> NULL) AND (epilepsy_class IN ('g',

> It shouldn't be possible to insert a value into focus when epilepsy_class
> has one of the values 'g' or 'n'. But it is. Can anyone help?

Should that not be "IS NOT NULL"?

- Richard Huxton