Tom Lane wrote:
I agree with that --- consider that you couldn't actually promise that
the sequence hadn't been dropped by the time the answer is returned,
anyway, unless you take out a lock on the sequence first.  Which doesn't
seem like a behavior that is wanted here.

The only objection I can see is that it arguably doesn't obey sequence permissions: you need SELECT on a sequence to see its currval(), whereas lastval() would return the same information without an equivalent permission check.


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