2013/10/3 Tom Lane <t...@sss.pgh.pa.us> > Pavel Stehule <pavel.steh...@gmail.com> writes: > > If you can do a update of some array in plpgsql now, then you have to > work > > with local copy only. It is a necessary precondition, and I am think it > is > > valid. > > If the proposal only relates to assignments to elements of plpgsql local > variables, it's probably safe, but it's also probably not of much value. > plpgsql has enough overhead that I'm doubting you'd get much real-world > speedup. I'm also not very excited about putting even more low-level > knowledge about array representation into plpgsql. >
I looked to code, and I am thinking so this can be done inside array related routines. We just have to signalize request for inplace update (if we have a local copy). I have not idea, how significant speedup can be (if any), but current behave is not friendly (and for multidimensional arrays there are no workaround), so it is interesting way - and long time I though about some similar optimization. Regards Pavel > > regards, tom lane >
