| From: | "James B(dot) Byrne" <byrnejb(at)harte-lyne(dot)ca> |
|---|---|
| To: | "Dann Corbit" <DCorbit(at)connx(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: INSERT or UPDATE |
| Date: | 2009-04-06 21:05:49 |
| Message-ID: | 38641.216.185.71.24.1239051949.squirrel@webmail.harte-lyne.ca |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
On Mon, April 6, 2009 17:00, Dann Corbit wrote:
.
>
> It is a difficult question.
>
> For instance, there are many possibilities when a collision occurs.
>
> I guess that for some collisions, sharing the name is OK.
>
I failed to explicitly state what the PK looked like.
entity_id(entities.id) +
identifier_type ('AKNA') +
identifier_value(entities.common_name)
There will only be a PK collision when we attempt to add a duplicate
common name for the same entity, which means it already exists and
does not need to be added again.
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