Julien <julien(at)sgme(dot)com> writes:
> I would like to drop multiple roles via SQL.
> I can figure how to list my specific roles with a select on pg_roles
> but deleting these roles from pg_roles is probably not a good
It would be safe if and only if you're entirely certain that the roles
own no objects and have no privileges granted anywhere. But I wouldn't
risk it anyway --- for example, if you do it like that, you have no
protection against accidentally deleting all your superuser roles.
> Is there any clean way to do this with SQL or do I have to make a script ?
You need a script ... but keep in mind that in 9.0 and up, there's the
DO command, which allows an anonymous script. So, something like
declare rolename text;
for rolename in select rolname from pg_roles where ...
execute 'DROP ROLE ' || quote_identifier(rolename);
regards, tom lane
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