PRIMARY KEY

Hi people,

Does anybody happen to know how I can alter a user table to include the
primary key? I'm using the beta4 version of Postgresql7.0, and I'm aware
that the primary key has already been implemented. I've tried to do ALTER
TABLE ADD CONSTRAINT PRIMARY KEY but it didn't work.

Well, in the pre-foreign key days, an unique not null column was the
same as primary key. Now foreign keys refer to them as special. I
don't think ALTER TABLE supports PRIMARY KEY changes, though it should.

-- 
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