$map['select']='id, NAME';
$map['from'] = 'bank_branch bb';
$map['limit'] = '20';
$map['like'] = array('NAME',$keyword) ;
//$map['like'] = array('a.cname',$this->input->get('cname'));
$list['list'] = $this->User_model->selectAllList($map);
$sqll = $this->db->last_query();
获取最后一次执行的sql语句：
$sqll = $this->db->last_query();
print_r($sqll) ;