Postgres Pro
Downloads
Home   >   mailing lists

Re: Bug in nbtree optimization to skip > operator comparisons (or < comparisons in backwards scans) - Mailing list pgsql-hackers

From Alexander Korotkov
Subject Re: Bug in nbtree optimization to skip > operator comparisons (or < comparisons in backwards scans)
Date
Msg-id CAPpHfdtrX38rvS7Dk+fJ7kwVjgC5eN1n==2YxzVAy8VOvi6Z=Q@mail.gmail.com
Whole thread Raw
In response to Re: Bug in nbtree optimization to skip > operator comparisons (or < comparisons in backwards scans)  (Alexander Korotkov <aekorotkov@gmail.com>)
List pgsql-hackers
Tree view 
On Mon, Dec 11, 2023 at 5:56 PM Alexander Korotkov <aekorotkov@gmail.com> wrote:
> > BTW, do we really need to keep around the BTScanOpaqueData.firstPage
> > field? Why can't the call to _bt_readpage from _bt_first (and from
> > _bt_endpoint) just pass "firstPage=true" as a simple argument? Note
> > that the first call to _bt_readpage must take place from _bt_first (or
> > from _bt_endpoint). The first _bt_first call is already kind of
> > special, in a way that is directly related to this issue. I added some
> > comments about that to today's commit c9c0589fda, in fact -- I think
> > it's an important issue in general.
>
> Please, check the attached patchset.

Sorry, I forgot the attachment.  Here it is.

------
Regards,
Alexander Korotkov
Attachment

pgsql-hackers by date:

Previous
From: Robert Haas
Date:
Subject: Re: trying again to get incremental backup
Next
From: James Coleman
Date:
Subject: Teach predtest about IS [NOT] proofs