On Thu, Jul 28, 2005 at 04:04:25PM -0700, Karim Nassar wrote: > I ran into a situation today maintaining someone else's code where the > sum time running 2 queries seems to be faster than 1. The original code > was split into two queries. I thought about joining them, but > considering the intelligence of my predecessor, I wanted to test it. > > The question is, which technique is really faster? Is there some hidden > setup cost I don't see with explain analyze?
To see which technique will be faster in your application, time the application code. The queries you show are taking fractions of a millisecond; the communications overhead of executing two queries might make that technique significantly slower than just the server execution time that EXPLAIN ANALYZE shows. -- Michael Fuhr http://www.fuhr.org/~mfuhr/ ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
