Check out 
http://ayende.com/Blog/archive/2006/10/28/QueryingCollectionsInNHibernate.aspx.
It demonstrates EXISTS sub-queries nicely, through HQL and through
criteria.

Cheers,
John

On Aug 6, 1:01 pm, Marvin Massih <marvin.mas...@googlemail.com> wrote:
> On 6 Aug., 13:27, Jakob Tikjøb Andersen <j...@miracleas.dk> wrote:
>
> > Which database are we talking about? Doesn't it support LIMIT or something
> > similar?
>
> Gupta/Unify SQLBase. We're moving to MSSQL, but the program should
> still run on the old DBMS.
>
> > Depending on that selecting a constant would still force you to go through
> > all rows to get the correct amount so a count would probarbly be as
> > effective
>
> Selecting a constant would be easier to write.
> The queries I'm talking about come from configuration entries in the
> database, it would be nice if I could simply prefix the "from Class
> c ..." queries with a "select 1", then the configuration entries would
> be shorter and less prone to mistakes.
>
> Marvin
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