Zend Framework中的Zend_Db不支持模糊查询?解决思路

Zend Framework中的Zend_Db不支持模糊查询???
Zend Framework中的Zend_Db是不是不支持like查询...
下面为我的主要代码:

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->class Dtstockgrade extends Zend_Db_Table_Abstract {        protected $_name = 'dtstockgrade';    protected $_db;        public function init(){                $this->_db=$this->getAdapter();        }        public function getListSize($classid='',$author='',$stockcode='',$title='',$time=''){        if(strlen($classid)>1){            $where=" classid='".$classid."'";        }else{            $where=" createtime > '".$time."'";            if(strlen($author)>1){                $where.=" and author like '%".$author."%' ";            }            if(strlen($stockcode)>1){                $where.=" and stockcode='".$stockcode."' ";            }            if(strlen($title)>1){                $where.=" and title like '%".$title."%' ";            }        }        $sql="select count(*) as total from  dtstockgrade where $where";        //file_put_contents("d://a.txt",$sql);         $sql=$this->_db->quoteInto($sql,'');        $result=$this->_db->query($sql);        $result=$result->fetchAll();        return $result;    }}

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