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<CRPence>
Even if a timestamp with necessary precision is not guaranteed to be unique,
there is of course, for example, the result of the SQL scalar function
GENERATE_UNIQUE() [generates a UUID] which is a unique value satisfactory
for sequencing and that includes a TIMESTAMP.
</CRPence>
... a couple of years ago I've evaluated GENUUID on AS/400; the
documentation ended up with "most likely unique" and testing in a heavy
parallel environment brought up collisions; as far as I remember the
implementation did not include the processor number, with the result of
possible duplicate values on multi processor boxes.
D*B
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