If you are a SQL programmer, learning recursive SQL techniques can be a boon to your productivity. A recursive query is one that refers to itself. I think the best way to quickly grasp the concept of ...

-- study_group_members 의 SELECT 정책이 "같은 그룹 동료" 조회를 위해 -- 자기 자신(study_group_members) 을 EXISTS 서브쿼리로 참조했음. -- PostgreSQL 은 서브쿼리 SELECT 에도 RLS 정책을 적용 → 자기 정책 재귀 발동 → -- "infinite recursion detected in ...

drop policy if exists "teachers_manage_own_classrooms" on public.classrooms; drop policy if exists "students_read_joined_classrooms" on public.classrooms; drop policy if exists ...

A mind-juggling puzzle indeed! Sharing if you try solve it without using recursion at all and without checking the comments and ChatGPT 😄 . Hint: If you know how to generate a number series in SQL, ...