Vincenzo Romano escribió: > The values are here below. I suppose that the "hashed" > ones imply a default value. Correct (widely known as "commented out") > By the way, it seems that the problem arises with only one query, > while the other ones behave almost the same all the time. Let's see the EXPLAIN ANALYZE. Does it involve the big table? -- Alvaro Herrera Valdivia, Chile ICBM: S 39º 49' 18.1", W 73º 13' 56.4" "There is evil in the world. There are dark, awful things. Occasionally, we get a glimpse of them. But there are dark corners; horrors almost impossible to imagine... even in our worst nightmares." (Van Helsing, Dracula A.D. 1972)