array(2) {
  [0]=>
  string(218) "select * from (select * from tb_produtos where ativo = 's' and vale_presente = 'n'  and autor = 3523 order by visualizacao desc, peso desc, altura desc, largura desc, comprimento desc limit -8, 12) as t order by rand()"
  [1]=>
  array(0) {
  }
}

ERROR: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-8, 12) as t order by rand()' at line 1