Re: GIN pageinspect support for entry tree and posting tree

On Thu, 8 Jan 2026 at 01:13, Kirill Reshke <reshkekirill(at)gmail(dot)com> wrote:
>
> On Wed, 7 Jan 2026 at 21:41, Peter Eisentraut <peter(at)eisentraut(dot)org> wrote:
> >
> > On 06.01.26 17:44, Kirill Reshke wrote:
> > > On Tue, 6 Jan 2026 at 21:28, Kirill Reshke <reshkekirill(at)gmail(dot)com> wrote:
> > >>
> > >> On Mon, 5 Jan 2026 at 13:39, Andrey Borodin <x4mmm(at)yandex-team(dot)ru> wrote:
> > >>>
> > >>>
> > >>>
> > >>>> On 4 Jan 2026, at 00:25, Kirill Reshke <reshkekirill(at)gmail(dot)com> wrote:
> > >>>>
> > >>>> PFA v6
> > >>>
> > >>> Would it be theoretically possible to unite functions for different GIN page types?
> > >>> e.g. merge gin_entrypage_items + gin_datapage_items -> gin_tree_items? Or is it an awkward API?
> > >>
> > >> For this, I borrowed this design from HASH and BRIN pageinspect
> > >> implementation. For them, we have one function-per-page-type. So,
> > >> maybe we can have dynamic schema here, but I don't see this as an
> > >> improvement to design.
> > >>
> > >> --
> > >> Best regards,
> > >> Kirill Reshke
> > >
> > > CF bot did like trailing whitespace in regression output files,
> > > posting v8 with this issue fixed.
> >
> > I noticed that the newly added C code could use a bit of modernization.
> > See attached patch for some suggestions. I only treated the new
> > gin_entrypage_items(); the new gin_datapage_items() could use mostly the
> > same changes. One of the main changes is to push many local variables
> > to smaller scopes. Also some changes in ereport parentheses style,
> > palloc style, some whitespace changes. (The whole patch also needs
> > pgindent treatment.)
>
>
> Hi!
> Thank you. I included your changes in v9, and also did a similar
> cleanup in gin_datapage_items().
> For pg_ident run sake, and for general benefit, there is also v9-0001
> which does cleanups similar to your changes for already-existing
> functions
> like gin_leafpage_items etc.
>
> --
> Best regards,
> Kirill Reshke

PFA v10 with `make check` that passes.
Previous version missed dot at the end of errhint sentence

--
Best regards,
Kirill Reshke