Re: Is it useful to record whether plans are generic or custom?

At Thu, 04 Feb 2021 10:16:47 +0900, torikoshia <torikoshia(at)oss(dot)nttdata(dot)com> wrote in
> Chengxi Sun, Yamada-san, Horiguchi-san,
>
> Thanks for all your comments.
> Adding only the number of generic plan execution seems acceptable.
>
> On Mon, Jan 25, 2021 at 2:10 PM Kyotaro Horiguchi
> <horikyota(dot)ntt(at)gmail(dot)com> wrote:
> > Note that ActivePortal is the closest nested portal. So it gives the
> > wrong result for nested portals.
>
> I may be wrong, but I thought it was ok since the closest nested
> portal is the portal to be executed.

After executing the inner-most portal, is_plan_type_generic has a
value for the inner-most portal and it won't be changed ever after. At
the ExecutorEnd of all the upper-portals see the value for the
inner-most portal left behind is_plan_type_generic nevertheless the
portals at every nest level are indenpendent.

> ActivePortal is used in ExecutorStart hook in the patch.
> And as far as I read PortalStart(), ActivePortal is changed to the
> portal to be executed before ExecutorStart().
>
> If possible, could you tell me the specific case which causes wrong
> results?

Running a plpgsql function that does PREPRE in a query that does
PREPARE?

regards.

--
Kyotaro Horiguchi
NTT Open Source Software Center