Question

我正在开发一种视频存档，wfsu.org / Dimensions，我正在尝试使用mysql和php为相关视频提供一个好的查询/算法组合。该数据库具有标题，关键字，描述，类别和生产者的另一个标准化1：m表。我有一个简单的算法，但如果任何有智慧的人看到它，他们会发现它产生了一组非常糟糕的“相关”视频。任何想法或帮助将不胜感激!!

每个请求这里是我正在使用的简单算法：

//if the segment isnt a generic dimensions use this query that makes sure they're in the same category
if($segType != 2)
{
    $query = "SELECT `title`, `description`, `air_date`, `keywords`, `post_id`, `img_filename`     
    FROM `archive_post` 
    WHERE `segment_type` = $segType 
    AND `post_id` != $id 
    AND NOW() > ADDTIME(`air_date`, '20:0:0') 
    ORDER BY `air_date` DESC LIMIT 5";
}
else //otherwise we want a query that checks to see if there are any similar keywords
{
    $query = "SELECT `title`, `description`, `air_date`, `keywords`, `post_id`, `img_filename` 
    FROM `archive_post` 
    WHERE (";
            $kwArray = preg_split("/[\s,-]+/", mysql_real_escape_string($keywords));

            foreach($kwArray as $kw)
            {
                $query .= "`keywords` LIKE '%$kw%' OR";
    }
    $query = substr($query, 0, -3);
    $query .=  ")
    AND `post_id` != $id 
    AND NOW() > ADDTIME(`air_date`, '20:0:0') 
    ORDER BY `air_date` DESC LIMIT 5";
}

$result = $dbConnection->runQuery($query);
if(mysql_num_rows($result) == 0) //if we can't find any 'related' videos what do?
{

}
else
{
    while($row = mysql_fetch_array($result))
    {
            $moreTitle = $row['title'];
    $moreID = $row['post_id'];
            $moreDescription = cleanDescription($row['description']);
            $moreDescription = substr($moreDescription, 0, 50).'...';
            $moreDate = strtotime( $row['air_date'], time() );  
            $moreDate = date( "F j, Y" , $moreDate );

            $relatedVideos .= "<li> <a href='viewvideo.php?num=$moreID'></a><h3>$moreTitle</h3>
                        <div class='featuredStory'><span class='featuredDate'>$moreDate</span> &sdot; $moreDescription</div></li>";
    }
}

Answer 1

我要回答我的问题，以便任何处于类似困境的人都会面包屑。我查看了mysql的全文功能。首先，我发现它仅用于myISAM，在阅读之后，我发现与当前的innodb相比，它不太理想。

Fulltext Search with InnoDB

我最终对我想要搜索的3个关键部分的索引进行了全文查询，并且它完全符合我的需求！

与mysql和php相关的视频

1 个答案: