Dealing with large query results

Greetings,

I keep seeing reference to an 8K limit on query results.  So how to deal
with query results greater than 8K?  Am I under the wrong impression that
when you run a query from, say libpq, that each retch row is returned only
when you execute a fetchrow?  Or is the whole query stuffed in to a buffer
which has an 8K limit?

I have to deal with some queries that create a huge result, and/or doing
reports requires a large result set.  How can I deal with these larger results?

I'll probably get flamed for asking this one but, how can I step through a
table?  Hey, sometimes you just have to do it.

Thanks,
Matthew