--
-- membership_rel__ban/1
--
create or replace function membership_rel__ban(
  integer
) returns int4 as $$

declare
  ban__rel_id           alias for $1;  
begin
    update membership_rels
    set member_state = 'banned'
    where rel_id = ban__rel_id;

    return 0; 
end;$$ language plpgsql;