At 14:42 11/10/00 +0100, Oliver Elphick wrote:
>
> CONSTRAINT ean CHECK (
> CASE WHEN eancode IS NULL OR brand IS NULL
> THEN 't'
> ELSE ean_checkdigit(
> (SELECT ean_prefix
> FROM brandname, product
> WHERE brandname.id = product.brand
> ), eancode)
> END
> )
>);
>
>
>Can this be made to work at all (in 7.0.2)?
>
The short answer is that subselect in CHECK is not currently supported, and
is not planned for 7.1.
There was a thread about subselect in CHECK not so long ago (see 'checking
number of entries' on or around the 29/9). There was apparently also an
earlier discussion in which the meaning were not deemed to be clear. I
think the most recent discussion at least resolved the meaning, but not the
locking issues.
----------------------------------------------------------------
Philip Warner | __---_____
Albatross Consulting Pty. Ltd. |----/ - \
(A.B.N. 75 008 659 498) | /(@) ______---_
Tel: (+61) 0500 83 82 81 | _________ \
Fax: (+61) 0500 83 82 82 | ___________ |
Http://www.rhyme.com.au | / \|
| --________--
PGP key available upon request, | /
and from pgp5.ai.mit.edu:11371 |/
