On K, 2005-07-13 at 16:08 +0800, Christopher Kings-Lynne wrote: > Hi, > > Does PostgreSQL do the following optimisation: > > SELECT * FROM diary WHERE date = '2005-05-01' ORDER BY date; > > or in fact even better (for my situation) > > SELECT * FROM diary WHERE date BETWEEN '2005-05-01' AND '2005-05-01' > ORDER BY date; > > Does it know that the input to the sort routine is already sorted and > hence is a no-op?
Yes try EXPLAIN ;) -- Hannu Krosing <[EMAIL PROTECTED]> ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
