RE: ALTER TABLE...ADD CONSTRAINT?

Is anybody working on:

alter table <table> add constraint <name> primary key(column,...);

or

alter table <table> add constraint <name> unique(column,...);

or

alter table drop constraint

I'd be more than happy to work on either of the above in the current
implementation, however - I'm not sure it'd be worth it, given that the
constraints system might be up for a reimplementation.

I guess this is not really a small task as it relates to unifying
constraint handling, but for the PK & unique constraints at least, we must
already have code that does the work - all(?) that has to happen
is to make
sure the ALTER command calls it...is that right?

That is a thought - can someone point me to the C file that handles CREATE
TABLE so I can see how it's done? I can't for the life of me find that bit
of code!

Chris