On Wed, Apr 23, 2025 at 04:01:33PM +0200, Christoph Berg wrote:
> If I create a table in a PG13-or-earlier cluster, never ANALYZE it,
> and then pg_upgrade to 18 and run vacuumdb --analyze-only
> --missing-stats-only, the table will not get analyzed. The only table
> visited there is pg_largeobject.
I suspect this is due to commit 3d351d9, which started using -1 for
reltuples before the first vacuum/analyze. Before that, we set it to 0,
which could also mean the table is empty. --missing-stats-only checks for
reltuples != 0.
My first reaction is that we should just remove the reltuples != 0 check.
That means vacuumdb might analyze some empty tables, but that doesn't seem
too terrible.
--
nathan
