> I think I have found out why.. I have a where clause on a ID field but it > seems like I need to cast this integer to the same integer as the field is > defined in the table, else it will do a tablescan.
Yes, this is correct > Is this assumtion correct? And if it is, do I then need to change all my > sql's to cast the where clause where I just have a number (eg where field > = 1) to force the planner to use index scan instead of seq scan? Someone correct me if I'm wrong, but I believe numbers are int4's, so they need to be cast if your column is not an int4. Jon > > > BTJ > > > I am trying to tune my database and I discovered one select that does a > > seq scan on a table but I can't see why... All the join fields are indexed > > and I am returning just one record, so no sort is done. > > Does it just pick seq scan for the heck of it or is it a reason? > > > > Regards, > > > > BTJ > > > > ----------------------------------------------------------------------------------------------- > > Bjørn T Johansen (BSc,MNIF) > > Executive Manager > > [EMAIL PROTECTED] Havleik Consulting > > Phone : +47 67 54 15 17 Conradisvei 4 > > Fax : +47 67 54 13 91 N-1338 Sandvika > > Cellular : +47 926 93 298 http://www.havleik.no > > ----------------------------------------------------------------------------------------------- > > "The stickers on the side of the box said "Supported Platforms: Windows > > 98, Windows NT 4.0, > > Windows 2000 or better", so clearly Linux was a supported platform." > > ----------------------------------------------------------------------------------------------- > > > > > > ---------------------------(end of broadcast)--------------------------- > > TIP 2: you can get off all lists at once with the unregister command > > (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED]) > > > > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faqs/FAQ.html > ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
