fetch-mysql_real_query返回值是1,一直删除失败

fetchresult删除strmysql

        str.Format(_T("%s"),row[0]);        row=mysql_fetch_row(result);        while(ln[i]!=str)        {            CString strSQL;             MYSQL_RES *result;            strSQL.Format("delete from mytable where name=\'%s\'",str);            if(mysql_real_query(&mysql,(char*)(LPCTSTR)strSQL,(UINT)strSQL.GetLength())!=0)            {                AfxMessageBox("删除失败");            }            str.Format(_T("%s"),row[0]);            row=mysql_fetch_row(result);        }