Michael Fuhr <mike@fuhr.org> writes:
> An occasionally asked question is "How can I find out how many rows
> a cursor will return?" to which the answer is "Fetch them all." But
> what about a way to get the planner's estimate? Would anybody find
> that useful?
Given how far off it frequently is, I can't believe that any of the
people who ask for the feature would find this a satisfactory answer :-(
regards, tom lane