> What Philip seems to be asking for is a mechanism where by if a function > is marked as being mathematically deterministic (given a particular set of > parameters the same result is always returned -- eg: cos(), sin(), > etc) then the result is cached and next time the function is called with > the same argument(s) the result is retrieved from the cache instead of the > function being run again.
I was under the impression that the sin, cos, tan and like functions are marked non-volatile in the system catalogs and so are evaluated once per transaction only. Chris ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/users-lounge/docs/faq.html
