> In the extreme, no amount of added intelligence in the optimizer is going to > help it come up with any sane selectivity estimate for something like > > WHERE radius_authenticate(user) = 'OK'
Why not? The missing capability in this case is to be able to provide or generate (self learning?) statistics for a function that describe a typical result and the cost of getting that result. -- ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
