Create artificial key without temp sequence

[Hannes Dorbath <light@xxxxxxxxxxxxxxxxxxxx>]

I need to create an artificial key, something that numbers rows of a 
record set. I used to use temp sequences for that, but as I'm inside 
pl/pgsql, its OID cache constantly bites me. What other options are there?

Thanks in advance.


--
Regards,
Hannes Dorbath

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