Dmitry,

D> Yaffil supports MS SQL-style == operator, i.e. yours code
D> can be changed to

D> if (Old.Quantity !== New.Quantity) then

oh, then it's already done. :-)

D> But, this is the question - will be == migrated from Yaffil
D> to Firebird as other Yaffil features.

Can't see why not. I think only Dmitry Y. is in the position to
answer.

Ciao
--
Nando Dessena
mailto:nandod@...