任何人都可以帮我弄清楚为什么这些SQL查询花了这么长时间？

时间：2014-04-16 09:36:43

标签： php mysql phpmyadmin

以下代码片段来自我的global.class.php文件。当搜索“type”等于'postcode'或'part-number'时，我目前在执行SQL查询时遇到问题。有关处理时间的解释，请参阅下面的代码段。

function findOrder($type, $query) {
    $db = new db;
    $tasks = new tasks;

    if($type == 'order-id') {
        return $db->query("
            SELECT details.id, details.order_id, users.title, users.first_name, users.last_name, details.date_time, details.status
            FROM orders_details AS details
            LEFT JOIN orders_users AS users
            ON users.order_id = details.order_id
            WHERE details.order_id LIKE '$query'
            ORDER BY id DESC
        ");
    } elseif($type == 'postcode') {
        return $db->query("                
            SELECT addresses.id AS id, addresses.order_id, addresses.postcode, users.title, users.first_name, users.last_name, details.date_time, details.status 
            FROM orders_users as users 
            LEFT JOIN orders_details as details 
            ON users.order_id = details.order_id
            LEFT JOIN orders_addresses as addresses 
            ON addresses.order_id = details.order_id
            WHERE REPLACE(addresses.postcode, ' ','') LIKE '$query'
            ORDER BY id DESC
        ");
    } elseif($type == 'surname') {
        return $db->query("
            SELECT users.id AS id, users.order_id, users.title, users.first_name, users.last_name, details.date_time, details.status
            FROM orders_users AS users
            LEFT JOIN orders_details AS details 
            ON users.order_id = details.order_id
            WHERE REPLACE(users.last_name, ' ','') LIKE '$query'
            ORDER BY id DESC
        ");
    } elseif($type == 'part-number') {
        $query = $tasks->getProductID($query); //Change $query to product ID
        return $db->query("
            SELECT carts.id AS id, carts.order_id, carts.product_id, users.title, users.first_name, users.last_name, details.date_time, details.status
            FROM orders_users AS users
            LEFT JOIN orders_details AS details 
            ON users.order_id = details.order_id
            LEFT JOIN orders_carts AS carts 
            ON carts.order_id = details.order_id
            WHERE carts.product_id = '$query'
            ORDER BY id DESC
        ");
    }

}

请参阅以下执行时间：

type = order-id
query = 106696 //(1 result returned)
page time = 0.0074
sql time = 0.0065

type = surname
query = smith //(23 results returned)
page time = 0.0725
sql time = 0.0700

type = postcode
query = **hidden** //(1 result returned)
page time = 2.6505 
sql time = 0.0125

type = part-number
query = **hidden** //(13 results returned)
page time = 2.8564 //(I also checked the getProductID() function, and this takes 0.0123) 
sql time = 0.0470

页面时间是调用findOrder所需的时间（'type'，'query'）;

SQL时间是我在phpMyAdmin中直接重复查询所花费的时间。

我可以在order-id和surname查询与邮政编码和部件号查询之间看到的唯一区别是有一个额外的LEFT JOIN。这并不能解释为什么在phpMyAdmin中执行的相同查询返回的速度如此之快。我不知道为什么要花3秒钟才能返回一个不到50ms的查询。

其他人可以看到为什么会这样吗？如果您还有其他需要，请告诉我。

根据要求提供的解释性资料

订单ID：

  

id select_type表类型possible_keys键key_len ref rows Extra

     

1 SIMPLE details ALL NULL NULL NULL NULL 1975使用where;使用临时;使用filesort

     

1 SIMPLE用户ALL NULL NULL NULL NULL 1992

姓：

  

1个SIMPLE用户ALL NULL NULL NULL NULL 1992使用where;使用临时;使用filesort

     

1 SIMPLE details ALL NULL NULL NULL NULL 1975

邮编：

  

1 SIMPLE details ALL NULL NULL NULL NULL 1966使用临时;使用filesort

     

1 SIMPLE用户ALL NULL NULL NULL NULL 1983使用where;使用连接缓冲区

     

1 SIMPLE地址ALL NULL NULL NULL NULL 1983使用where;使用连接缓冲区

部件数：

  

1 SIMPLE details ALL NULL NULL NULL NULL 1975使用临时;使用filesort

     

1个SIMPLE用户ALL NULL NULL NULL NULL 1992使用where;使用连接缓冲区

     

1 SIMPLE carts ALL NULL NULL NULL NULL 3611使用where;使用连接缓冲区

按要求创建表格查询

--
-- Table structure for table `orders_addresses`
--

CREATE TABLE IF NOT EXISTS `orders_addresses` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `order_id` varchar(255) NOT NULL,
  `active` tinyint(4) NOT NULL,
  `company` varchar(255) NOT NULL,
  `line1` varchar(255) NOT NULL,
  `line2` varchar(255) NOT NULL,
  `line3` varchar(255) NOT NULL,
  `town` varchar(255) NOT NULL,
  `county` varchar(255) NOT NULL,
  `postcode` varchar(255) NOT NULL,
  `country` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=2004 ;

-- --------------------------------------------------------

--
-- Table structure for table `orders_carts`
--

CREATE TABLE IF NOT EXISTS `orders_carts` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `order_id` varchar(255) NOT NULL,
  `product_id` int(11) NOT NULL,
  `part_name` varchar(255) NOT NULL,
  `qty_ord` int(11) NOT NULL,
  `qty_rcv` int(11) NOT NULL,
  `cost_net` int(11) NOT NULL,
  `cost_gross` int(11) NOT NULL,
  `status` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=3629 ;

-- --------------------------------------------------------

--
-- Table structure for table `orders_details`
--

CREATE TABLE IF NOT EXISTS `orders_details` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `order_id` varchar(255) NOT NULL,
  `transaction_id` varchar(255) NOT NULL,
  `date_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `postage` int(11) NOT NULL,
  `sub_total` int(11) NOT NULL,
  `cart_vat` int(11) NOT NULL,
  `total` int(11) NOT NULL,
  `status` int(11) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1985 ;

-- --------------------------------------------------------

--
-- Table structure for table `orders_users`
--

CREATE TABLE IF NOT EXISTS `orders_users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `order_id` varchar(255) NOT NULL,
  `active` tinyint(4) NOT NULL,
  `title` varchar(255) NOT NULL,
  `first_name` varchar(255) NOT NULL,
  `last_name` varchar(255) NOT NULL,
  `email` varchar(255) NOT NULL,
  `telephone` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=2005 ;

1 个答案:

答案 0 :(得分：0)

尝试这个，

function findOrder($type, $query) {
$db = new db;
$tasks = new tasks;

if($type == 'order-id') {
    return $db->query("
        SELECT details.id, details.order_id, users.title, users.first_name, users.last_name, details.date_time, details.status
        FROM orders_details AS details
        LEFT JOIN orders_users AS users
        ON users.order_id = details.order_id
        WHERE details.order_id LIKE '$query'
        ORDER BY id DESC
    ");
} elseif($type == 'postcode') {
    return $db->query("                
        SELECT addresses.id AS id, addresses.order_id, addresses.postcode, users.title, users.first_name, users.last_name, details.date_time, details.status 
        FROM orders_users as users 
        LEFT JOIN orders_details as details 
        ON details.order_id = users.order_id
        LEFT JOIN orders_addresses as addresses 
        ON details.order_id = addresses.order_id
        WHERE REPLACE(addresses.postcode, ' ','') LIKE '$query'
        ORDER BY id DESC
    ");
} elseif($type == 'surname') {
    return $db->query("
        SELECT users.id AS id, users.order_id, users.title, users.first_name, users.last_name, details.date_time, details.status
        FROM orders_users AS users
        LEFT JOIN orders_details AS details 
        ON users.order_id = details.order_id
        WHERE REPLACE(users.last_name, ' ','') LIKE '$query'
        ORDER BY id DESC
    ");
} elseif($type == 'part-number') {
    $query = $tasks->getProductID($query); //Change $query to product ID
    return $db->query("
        SELECT carts.id AS id, carts.order_id, carts.product_id, users.title, users.first_name, users.last_name, details.date_time, details.status
        FROM orders_users AS users
        LEFT JOIN orders_details AS details 
        ON details.order_id = users.order_id
        LEFT JOIN orders_carts AS carts 
        ON details.order_id = carts.order_id
        WHERE carts.product_id = '$query'
        ORDER BY id DESC
    ");
}

}

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