Rod Taylor <[EMAIL PROTECTED]> writes: > On Fri, 2003-06-20 at 15:53, Yusuf wrote: >> Why would the following query take soo long to run? What does 28.12 msec = > represent, since the total running time is=20 >> 16801.86 ms.
> I'd hazard to guess that you have a whole slew of foreign keys cascading > to delete, update, or check many rows from other tables. Either that or some other AFTER trigger(s) that are taking lots of time. Those fire after the end of the statement, so EXPLAIN's measurement of runtime fails to include them. Given that this query appears to have deleted only one row, though, you sure seem to have a mighty slow trigger. If it's an FK, perhaps you are missing an index on the referencing column? The system doesn't force you to have an index on that side of an FK, but it's generally a good idea. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to [EMAIL PROTECTED])