Hi, thanks for the answer. It is very interest, because I readet many times that if I write the trigger in "C" it will work faster. In wich case will this trigger work faster if write it in "C"? In all my triggres I have "select ...." or "insert into mytable select ..." or "update mytable set ...where...". I need this info because I have a table with ~1.5 M rows and if I start to update 300 K from this rows it takes ~ 2h. If I remove the trigger for this table all the time is ~ 1 min.
regards, ivan. Tom Lane wrote: > pginfo <[EMAIL PROTECTED]> writes: > > I was supprised that the pgsql trigger take ~8 sec. to insert this rows > > and the "C" trigger take ~ 17 sec. > > The reason is that plpgsql caches the plan for the invoked SELECT, > whereas the way you coded the C function, it's re-planning that SELECT > on every call. > > 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]) ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match