Re: "variable not found in subplan target list"

On 2023-Mar-29, Amit Langote wrote:

> On Wed, Mar 29, 2023 at 3:39 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> writes:
> > > So I'm back home and found a couple more weird errors in the log:
> >
> > > ERROR: mismatching PartitionPruneInfo found at part_prune_index 0
> > > DETALLE: plan node relids (b 1), pruneinfo relids (b 36)
> >
> > This one reproduces for me.
>
> I've looked into this one and the attached patch fixes it for me.
> Turns out set_plan_refs()'s idea of when the entries from
> PlannerInfo.partPruneInfos are transferred into
> PlannerGlobal.partPruneInfo was wrong.

Thanks for the patch. I've pushed it to github for CI testing, and if
there are no problems I'll put it in.

> Though, I wonder if we need to keep ec386948948 that introduced the
> notion of part_prune_index around if the project that needed it [1]
> has moved on to an entirely different approach altogether, one that
> doesn't require hacking up the pruning code.

Hmm, that's indeed tempting.

--
Álvaro Herrera 48°01'N 7°57'E — https://www.EnterpriseDB.com/