On Wed, 2003-10-15 at 09:37, Patrick Giagnocavo +1.717.201.3366 wrote: > I think that (depending on PG version) adding a primary key will > create a unique index on that field. A primary key has to be unique, > so creating a unique index enforces that requirement.
It is, when you make a column a primary key, all you are really doing is having a unique index created and the column set to not null. This is the way it works as far back as I can remember in postgresql.
