Ok, that sounds weird...
Earlier, each node in the SQL tree had a struct containing all recursive
traits. This is now gone. It only contains a reference to all sub nodes
and its own specific traits.
Before this, there could be multiple classes representing multiple id
columns. Now there is one class representing ALL the name "id". Very
important for analyzing potential name clashes.
This namespace is for things the developer will not get in touch with
(normally) but the vendor might need to use for specialization of the
interpreter.
This separation is not fully completed yet, some changes will have to
follow...
Moved member template into name class to utilize the fact the class
aliases are really just aliases.
This makes the code leaner in many cases and less complex for the compiler
(I guess). It also has the benefit, that the field name is available as
string in the result_rows. This might be useful for debugging one day.
