Question

我使用 Codeigniter 创建了一个网站，我面临与速度相关的问题。

所有其他功能都要快得多，但我不知道为什么加载需要太多时间。

那么只有一个查询会执行该操作，但等待时间太长了。

此问题是在首次加载网站时发生的。

// 控制器

function hardwareFolder($uId){
    $Folder = $this->System_model->get_folder_category_id($uId);
    $menu = [
        [
            'id' => 'all',
            'pId' => '1',
            'name' => _('All'),
            'icon' => base_url('images/directory_icon.gif'),
            'isParent' => true,
            'checked' => true,
            'nocheck' => true,
            'open' => true,
            'dirlevel' => 'main',
            'dirType' => 'all',
        ],
        [
            'id' => $Folder[0]['c_type_id'],
            'pId' => $Folder[0]['c_type_pid'],
            'name' => 'Unfiled',
            'icon' => base_url('images/unfield.png'),
            'isParent' => true,
            'checked' => true,
            'nocheck' => true,
            'open' => true,
            'dirlevel' => 'main',
            'dirType' => 'unfiled',
        ],
        [
            'id' => $Folder[1]['c_type_id'],
            'pId' => $Folder[1]['c_type_pid'],
            'name' => _('Shared'),
            'icon' => base_url('images/sharedir.png'),
            'isParent' => true,
            'checked' => true,
            'nocheck' => true,
            'open' => true,
            'dirlevel' => 'main',
            'dirType' => 'shared',
        ],
    ];
    return $this->output
        ->set_content_type('application/json')
        ->set_output(json_encode($menu));
}

// 型号

function get_folder_category_id($uid){
     $q_s_type = "SELECT c_type_id,c_type_pid,c_type_name " .  
                    "FROM `codeigniter_system_category_type` " .  
                    "   WHERE `c_type_pid` = 0 " . 
                          "AND `c_type_name` = 'Others' " . 
                          "AND `c_module` = 'System' " . 
                          "AND `c_created_userID` = ".$uid . 
                    " UNION SELECT c_type_id,c_type_pid,c_type_name ". 
                    "    FROM `codeigniter_system_category_type` " .
                           "WHERE `c_type_pid` = 0 " . 
                               "AND `c_type_name` = 'Shared' " . 
                               "AND `c_module` = 'System' " .
                               "AND `c_created_userID` = ".$uid;

     return $this->db->query($q_s_type)->result_array();
 }

用Ajax调用脚本。

Answer 1

除非我非常错，否则唯一能改变这两个SELECT陈述的罪行就是检查c_type_name

的价值

如果是这样，您可以简化UNION，并通过更改

来丢失第二个SELECT

function get_folder_category_id($uid){
 $q_s_type = "SELECT c_type_id,c_type_pid,c_type_name " .  
                "FROM `codeigniter_system_category_type` " .  
                "   WHERE `c_type_pid` = 0 " . 
                      "AND `c_type_name` = 'Others' " . 
                      "AND `c_module` = 'System' " . 
                      "AND `c_created_userID` = ".$uid . 
                " UNION SELECT c_type_id,c_type_pid,c_type_name ". 
                "    FROM `codeigniter_system_category_type` " .
                       "WHERE `c_type_pid` = 0 " . 
                           "AND `c_type_name` = 'Shared' " . 
                           "AND `c_module` = 'System' " .
                           "AND `c_created_userID` = ".$uid;

 return $this->db->query($q_s_type)->result_array();
}

到（见this question

function get_folder_category_id($uid){
 $q_s_type = "SELECT c_type_id,c_type_pid,c_type_name " .  
                "FROM `codeigniter_system_category_type` " .  
                "   WHERE `c_type_pid` = 0 " . 
                      "AND `c_type_name` IN ('Others', 'Shared') " . 
                      "AND `c_module` = 'System' " . 
                      "AND `c_created_userID` = ".$uid;

 return $this->db->query($q_s_type)->result_array();
}

php脚本需要很长时间才能加载

1 个答案: