> The firebird rdb$fields stores nullability value of the domain/column. Then > the rdb$relation_fields ALSO store the nullability value of the > domain/column (this looks like the actual override). So firebird still doesn't > support overriding the not null constraint on the domain???
You make it sound like this is a problem. It is completely expected and appropriate. If you want to allow NULLs then define a new domain. Sean
