Re: Setting primary key on existing table

Hi Tom -

Anyway to do this on an existing table or do I have to recreate it?

Thanks.

On Wednesday 25 September 2002 10:20 am, you wrote:
> Doug Silver <dsilver@urchin.com> writes:
> > I would like to be able to redefine a field in a table to be a foreign
> > reference -- however this field was initially defined as just "serial"
> > and not "serial primary key".  I tried to add that constraint to the
> > table, but it didn't work.
>
> AFAIR, "serial" implies "unique not null" (at least in pre-7.3
> releases), so your column is a primary key in all but name.  All you'd
> get from marking it as primary key is not having to mention the column
> name when defining the foreign key reference.  Is it good enough to
> just write
>         ... foo int REFERENCES mytable(mycol)
> ?
>
>             regards, tom lane
>
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Doug Silver
Network Manager
Urchin Software Corp.    http://www.urchin.com
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