st 20. 1. 2021 v 21:32 odesÃlatel Tom Lane <t...@sss.pgh.pa.us> napsal:
> Pavel Stehule <pavel.steh...@gmail.com> writes: > > st 20. 1. 2021 v 21:07 odesÃlatel Tom Lane <t...@sss.pgh.pa.us> napsal: > >> Uh, what? I don't understand what this "partition context" is. > > > It was my name for an access to window partition local memory - > > WinGetPartitionLocalMemory > > Ah. > > > We need some interface for this cache > > I'm not convinced we need to expose that, or that it'd be very > satisfactory to plpgsql users if we did. The fact that it's fixed-size > and initializes to zeroes are both things that are okay for C programmers > but might be awkward to deal with in plpgsql code. At the very least it > would greatly constrain what data types you could usefully store. > > So I'd be inclined to leave that out, at least for the first version. > I think this functionality is relatively important. If somebody tries to implement own window function, then he starts with some variation of the row_num function. We can support only types of fixed length to begin. Regards Pavel > > regards, tom lane >
