> Not true. Currently, you need either OID *or* a primary key. Obviously,
> that id column should get a pk.
> We'll extend the grid some time, to accept any other unique keys also.
> Still, defining a PK on every table is best practice.
> Defining a column as serial does *not* guarantee it's unique!
Remember that unique indexes can have multiple NULL values. Also, oids
are not guaranteed unique.
Chris
