> Has anyone else experienced serious performance problems when using arithmetic > expressions in queries? ... > a and b are numeric(10, 3) numeric() is implemented with binary coded decimal representation, which is substantially slower than direct processor supported math involving just ints and floats. Try testing this with different types to see what happens. - Thomas ---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/users-lounge/docs/faq.html