BUG #19379: Role pg_read_all_data don't allowed read large objects

On Thursday, January 15, 2026, PG Bug reporting form <noreply(at)postgresql(dot)org>
wrote:

> The following bug has been logged on the website:
>
> Bug reference: 19379
> Logged by: Misha Shaygu
> Email address: long76(dot)git(at)mail(dot)ru
> PostgreSQL version: 17.7
> Operating system: Kubuntu 24.04
> Description:
>
> My goal: create role for backup any database on server
>
> Steps:
> 1. CREATE USER backup_user;
> 2. GRANT pg_read_all_data TO backup_user;
> 3. pg_dump my_db
> 4. got error to read large object
>
> Following by links
> https://www.postgresql.org/docs/17/predefined-roles.html
> https://www.postgresql.org/docs/17/lo-implementation.html
> "SELECT privileges are required to read a large object" and role
> "pg_read_all_data" grant it, but it don't work!
>
> Please fix it, thanks!
>

The docs you link note that all data is “tables, views, sequences”. Large
objects are not listed. Maybe that means the name is a bit misleading but
it’s working as documented.

Likewise, the LO page doesn’t say anything about read all being applicable.

David J.