Re: First draft of PG 17 release notes

On Wednesday, May 15, 2024, jian he <jian(dot)universality(at)gmail(dot)com> wrote:

> On Thu, May 9, 2024 at 12:04 PM Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> >
> > I have committed the first draft of the PG 17 release notes; you can
> > see the results here:
> >
> > https://momjian.us/pgsql_docs/release-17.html
> >
>
> in section: E.1.2. Migration to Version 17
>
> >> Rename I/O block read/write timing statistics columns of
> pg_stat_statement (Nazir Bilal Yavuz)
> >> This renames "blk_read_time" to "shared_blk_read_time", and
> "blk_write_time" to "shared_blk_write_time".
>
> we only mentioned, pg_stat_statements some columns name changed
> in "E.1.2. Migration to Version 17"
> but if you look at the release note pg_stat_statements section,
> we added a bunch of columns, which are far more incompatibile than
> just colunm name changes.
>
> not sure we need add these in section "E.1.2. Migration to Version 17"
>
>
New columns are not a migration issue since nothing being migrated forward
ever referenced them. Its the ones that existing code knows about that
we’ve removed (including renames) that matter from a migration perspective.

David J.