Zitat von Tom Lane <tgl@sss.pgh.pa.us>:
> I believe the point of the recommendation is that if you only need type-4
> UUIDs, you can get that from pgcrypto without needing the external
> dependency of the OSSP UUID library. This is a bit less urgent than when
> that text was written, because now we also support building that contrib
> module against some other implementations; but there are still going to
> be systems on which installing uuid-ossp is inconvenient.
>
> There may also be a belief that pgcrypto's result is more
> cryptographically secure, though I wouldn't swear to that.
Thanks for the light :-)
Kind regards Thiemo
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