Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> On ons, 2012-03-07 at 16:49 -0500, Tom Lane wrote:
>> Still, it seems rather arbitrary to say that the row count property is
>> the thing to test for that purpose and no other is. Why not return None
>> for any property that's not sensible?
> Hmm, above you said you were in favor of throwing an error rather than
> returning None?
I said it was a reasonable alternative, not that it was the only one
we should consider. The behavior of .nrows() might be accidental,
but perhaps it is a preferable model to adopt.
regards, tom lane