We checked some check query based on some operations on pg_depend table. This query did different result when database was migrated with pg_dump or with pg_upgrade. I found so this query was broken, but I found interesting thing.
The count is 1 for any objid
select distinct count(distinct classid), objid from pg_depend group by objid;
when system was loaded from dump
but when we used pg_upgrade, then previous rule was invalid.
