Question

我尝试使用codeigniter更快地进行搜索，我使用分页库，我必须计算查询返回的记录，该表包含超过1.2百万条记录... num_rows（）函数非常慢（大约需要3个小时）

public function search()
{


    $this->output->enable_profiler(TRUE);

    $data = array();

    $query = $this->input->get('query');
    $filter = $this->input->get('f');
    $hd = $this->input->get('hd');


    if($hd == 'true'):
        $this->db->where('hd',1);
    endif;


    $request = urldecode($query);

    $where = "MATCH (name,tags) AGAINST ('".$request."' IN BOOLEAN MODE)";
    $this->db->where($where);   

    $get_vars = $this->input->get();

    if(is_array($get_vars) && ($this->input->get('query')) ):
        $config['suffix'] = '?'.http_build_query($get_vars,'', '&');
    endif;

    $config['base_url'] = base_url('search');
    $config['per_page'] =  8;
    $config['num_links'] = 8;
    $config['full_tag_open'] = '<div class="pagination"><ul>';
    $config['full_tag_close'] = '</ul></div><!--pagination-->';
    $config['first_link'] = '&laquo; First';
    $config['first_tag_open'] = '<li class="prev page">';
    $config['first_tag_close'] = '</li>';
    $config['last_link'] = 'Last &raquo;';
    $config['last_tag_open'] = '<li class="next page">';
    $config['last_tag_close'] = '</li>';
    $config['next_link'] = 'Suivant &rarr;';
    $config['next_tag_open'] = '<li class="next page">';
    $config['next_tag_close'] = '</li>';
    $config['prev_link'] = '&larr; Précédent';
    $config['prev_tag_open'] = '<li class="prev page">';
    $config['prev_tag_close'] = '</li>';
    $config['cur_tag_open'] = '<li class="active"><a href="">';
    $config['cur_tag_close'] = '</a></li>';
    $config['num_tag_open'] = '<li class="page">';
    $config['num_tag_close'] = '</li>';

    $query = clone $this->db;
    $config['total_rows'] = $query->get('videos')->num_rows();      
    $config['segment'] = $this->uri->segment(2);
    $this->pagination->initialize($config);

    $data['results'] = $this->db->get('videos',$config['per_page'],$this->uri->segment(2))->result();

    $this->load->view('search',$data);
}

任何解决方案？

Answer 1

正如@MonkeyZeus的评论所表明的那样，使用SQL count()函数可以提高性能。 Codeigniter通过查询构建器函数count_all_results($table = '', $reset = TRUE)提供此功能。

该功能将考虑您已放置的任何限制器，例如where，or_where，like等

更改此

$query = clone $this->db;
$config['total_rows'] = $query->get('videos')->num_rows();

到这个

//next line is not needed because the query will not be reset by the row count
//$query = clone $this->db;
$config['total_rows'] = $this->db->count_all_results('videos', FALSE);

我有兴趣了解执行时间的变化。

Codeigniter计数太慢 - 分页

1 个答案: