>Surely you don't actually use all billion values. No, but generating index values on demand is a complication I would like to avoid. But for a million values, the masked values could be pre-generated. And I could generate multiple such indexes by simply using a different seed value for the random number generator.
But I still hold out hope for some kind of algorithm that does not require a table lookup. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
