vac_update_datfrozenxid will raise "wrong tuple length" if pg_database tuple contains toast attribute.

CREATE DATABASE vacuum_freeze_test;

-- create helper function

create or replace function toast_pg_database_datacl() returns text as $body$

declare

        mycounter int;

begin

        for mycounter in select i from generate_series(1, 2800) i loop

                execute 'create role aaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb' || mycounter;

                execute 'grant ALL on database vacuum_freeze_test to aaaabbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb' || mycounter;

        end loop;

        return 'ok';

end;

$body$ language plpgsql volatile strict;

-- create roles and grant on the database

select toast_pg_database_datacl();

-- connect to the database

\c vacuum_freeze_test

-- chech the size of column datacl

select datname, pg_column_size(datacl) as datacl_size, age(datfrozenxid) from pg_database where datname='vacuum_freeze_test';

-- execute vacuum freeze and it should raise "wrong tuple length"

vacuum freeze;