>I've taken over an app that uses sys(2015) to generate values for a candidate key. Users are getting "Unique index violation" errors occacionally and have to re-enter data. I cannot change the data structure to hold more characters.
>
>I'm replacing 2nd and 3rd chars with info from userid, in hopes of greater chance of uniqueness.
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>Any better ideas for a temporary quick fix?
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>Much Thanks
>Jeff

Why not just implement a simple key generator? Ie, store the key value in a table, and increment each time it is called.