On Sat, 2005-11-19 at 06:29, Alex Wang wrote: > Great infomation. I didn't know that update is equal to delete+insert in > Postgres. I would be more careful on designing the database access method in > this case. Just make sure you have regular vacuums scheduled (or run them from within your app) and you're fine. ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match