create table public.problems (
  id bigint generated by default as identity,
  title text not null,
  description text not null,
  type character varying not null,
  tags character varying [] null,
  author uuid null,
  metadata jsonb null,
  is_draft boolean null default true,
  is_hidden boolean null default false,
  created_at timestamp with time zone null default now(),
  constraint problems_pkey primary key (id),
  constraint problems_author_fkey foreign key (author) references auth.users (id)
) tablespace pg_default;
alter table public.problems enable row level security;
create policy "Public problems are viewable by everyone." on problems for
select using (true);
create table public.problem_cases (
  id bigint generated by default as identity,
  spec jsonb not null,
  limitations jsonb not null,
  answer jsonb not null,
  problem int8 not null,
  is_hidden bool not null default true,
  constraint problem_cases_pkey primary key (id),
  constraint problem_cases_author_fkey foreign key (problem) references public.problems (id)
) tablespace pg_default;
alter table public.problem_cases enable row level security;
create policy "Public problem cases are viewable by everyone." on problem_cases for
select using (is_hidden = false);