--- In firebird-support@yahoogroups.com, "Martijn Tonies"
<m.tonies@u...> wrote:

> There's no DDL statement to do this.
>
> You can do it via a system table update. Database Workbench
> does it the same way. It's RDB$NULL_FLAG in RDB$RELATION_FIELDS,
> I believe :-)
>

OK, thanks. I can live with it, I just wanted to make sure I'm not
missing something.

Cheers
Thomas