Query size?

I'm working with another developer to produce an iPhone app - he's writing the
app and I'm writing the server that provides the data to it. One of the
queries he's doing might produce hundreds or thousands of results, and he
doesn't want me sending that much data.

So I'm wondering if there is a simple way to determine if a query is going to
produce a result of more than N rows? Is the only way to do a "select
count(*)" query first, or there something in the ResultSet that tells me how
many results are queued up?

--
Paul Tomblin <ptomblin(at)xcski(dot)com> http://blog.xcski.com/
God is real, unless declared as an integer.