|Subject||Re: [Firebird-Java] Re: delete with null not executed|
> There's no way to tell "I know, it's empty. No, it's not unknownIf you want to say "for this entity this attribute is not applicable",
> because of that, it's empty and so it's different with something that
> is not empty"
then your table is not normalized enough. But if "empty" is part of the
attribute's domain, then make it explicit and put some value to the
attribute (-1 for example).
I think that confusion comes from the programming language, where a null
pointer/reference compared to NULL constant gives true.