I’ve noticed a weird situation on one of our development servers running 
PostgreSQL 9.1.3 where roles have been dropped even though objects depend on 
that user. I didn’t think that was possible due to the dependency checks on 
DROP USER/ROLE. For example, there is a database that shows this connect grant 
to a user that was known as foo1_userA (oid 3562339547): 3562339547=c/postgres 
This happened after a nightly database import script was run that takes in new 
clone databases from production. After the script imports new databases another 
script runs that drop all users matching a regex (/^foo1_user/ for example) to 
clear out stale users. This obviously should succeed dropping a user that does 
not have dependent objects and should fail on users that do. For some this is 
not holding true. Is this a bug? Am I relying too much on DROP USER/ROLE? Any 
alternative approaches to clearing out users that do not have dependent objects 
or guidance on debugging this situation would be much appreciated! -- Robert


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