unchecked-subtract

(unchecked-subtract a b)

Answers the difference of integers wrapped to 64 bits, so (unchecked-subtract -9223372036854775808 1) is 9223372036854775807. A double or a ratio takes the plain result. nil and non-numbers signal. As a value a two-argument function.

An integer past 64 bits is a plain integer here, so the oracle's unwrapped bigint (100000000000000000000N) wraps too.