Fabrice Chapuis <fabrice636861(at)gmail(dot)com> writes:
> I do the following command when connecting locally with user postgres
> SET ROLE asuperrole; -- asuperrole has superuser privilege
> GRANT SELECT ON pg_statistic TO test_role;
> why the grantee is postgres?
You mean "grantor", no? When a superuser does grant/revoke on some
object, it's recorded as though the object owner issued the command.
And postgres is the owner of the pg_statistic table.
regards, tom lane