Re: pervasiveness of surrogate (also called synthetic) keys

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От Scott Marlowe
Тема Re: pervasiveness of surrogate (also called synthetic) keys
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Msg-id BANLkTi=ByyLAS5zn_94O3B=cWrJx7DN+iw@mail.gmail.com
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Ответ на Re: pervasiveness of surrogate (also called synthetic) keys  (Craig Ringer <craig@postnewspapers.com.au>)
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On Mon, May 2, 2011 at 7:43 PM, Craig Ringer
<craig@postnewspapers.com.au> wrote:
> I'm now strongly in favour of keeping an internal key that users never
> see, and having separate user-visible identifiers. The users can demand
> that those identifiers change format or generation method and it's an

It's far easier to change a unique constraint on the fly than a PK in
a busy production database.

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