| From: | Noah Misch <noah(at)leadboat(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Xiaoran Wang <fanfuxiaoran(at)gmail(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Andres Freund <andres(at)anarazel(dot)de> |
| Subject: | Re: Recovering from detoast-related catcache invalidations |
| Date: | 2024-01-14 20:14:11 |
| Message-ID: | 20240114201411.d0@rfd.leadboat.com |
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| Lists: | pgsql-hackers |
On Fri, Jan 12, 2024 at 03:47:13PM -0500, Tom Lane wrote:
> I wrote:
> > This is uncomfortably much in bed with the tuple table slot code,
> > perhaps, but I don't see a way to do it more cleanly unless we want
> > to add some new provisions to that API. Andres, do you have any
> > thoughts about that?
>
> Oh! After nosing around a bit more I remembered systable_recheck_tuple,
> which is meant for exactly this purpose. So v4 attached.
systable_recheck_tuple() is blind to heap_inplace_update(), so it's not a
general proxy for invalidation messages. The commit for $SUBJECT (ad98fb1)
doesn't create any new malfunctions, but I expect the systable_recheck_tuple()
part will change again before the heap_inplace_update() story is over
(https://postgr.es/m/flat/CAMp+ueZQz3yDk7qg42hk6-9gxniYbp-=bG2mgqecErqR5gGGOA(at)mail(dot)gmail(dot)com)
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