On Wed, Aug 29, 2012 at 12:15 AM, Rick Debay <rdebay@...> wrote:

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> Does anyone have a Luhn algorithm for Firebird? Especially one I can
> embed in a check constraint?

I have one written in Pascal, that you can translate or use as UDF:
https://github.com/ik5/credit-card-library/blob/master/src/units/luhn.pp

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> Thanks, Rick DeBay
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