darcy@druid.net ("D'Arcy J.M. Cain") writes:
> And even given all of that, I would probably still use serial.
>> and has been recommended. But having a hash function over the address
>> column as the primary key means I can always regenerate my primary key
>
> Danger, Will Robinson. The phrase "regenerate my primary key"
> immediately raises the hairs on the back of my neck. If the primary
> key can ever change, you have a broken schema.
Actually, I'd call it worse than that...
A schema is "merely" a technical detail.
The trouble is that if the primary key can ever change, then you have
a broken model for the data.
You can do "technical things" to fix problems with a schema; if the
data model is busted, then your schema is necessarily broken, in a way
that cannot be fixed.
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