select distinct a.*
  from  pbx_funcoes a, pbx_funcoes b
  where b.fun_id_pai = a.fun_id
    and coalesce(a.fun_id_pai, 0) = 0
    and a.fun_public = 0


    select distinct b.*
  from  pbx_funcoes a, pbx_funcoes b
  where b.fun_id_pai = a.fun_id
    and b.fun_public = 0