Calling extra functions in database nodes

Dear all,

I'd like to call an additional SQL function (a database configuration function) as part of, or before, a query.

Specifically, I'd like to do something like:

set rdkit.dice_threshold=0.8;

select * from fps where mfp2#query;

Is there any way to do this?

I asked about this at one of the knime partner meetings and I don't think the functionality was ever added; apologies if I've forgotten something.