Keep it simple use UUID.
I'm not sold on UUID PK's ... Mind you I have _no_ real world
comparison data to support this, but I have to believe it's more
expensive in every category except insert (and only that for WO
because you have to do a PK query first instead of using autoincrement
columns). Big String PK's just sort of give me the wilies -- I would
be interested to see real perf #'s on this, though. Also, this
presumes that you have the choice of your PK generation, which is not
always the case. We have had to integrate with existing MySQL db's
and it's a real hassle.
ms
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