Francisco Olarte wrote:

> unless you know of an easy way to generate a random permutation on the
> fly without using a lot of memory, I do not.

It could be done by encrypting the stream.

For 32 bits integers:
https://wiki.postgresql.org/wiki/Skip32

For 64 bits integers:
https://wiki.postgresql.org/wiki/XTEA


Best regards,
-- 
Daniel Vérité
PostgreSQL-powered mailer: http://www.manitou-mail.org
Twitter: @DanielVerite


-- 
Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general

Reply via email to