Question

我的博客/标签有3张表

lm_blog，lm_blog_tags和lm_blog_tag_relationships。

我现在正在尝试添加使用布尔搜索的搜索功能。我没那么好，但我也无法搜索标签。

SELECT blog.blog_id, title, url, summary, 
GROUP_CONCAT(tags.tag SEPARATOR ':') AS tags, 
MATCH(title) AGAINST ($query IN BOOLEAN MODE) AS title_rel, 
MATCH(summary) AGAINST ($query IN BOOLEAN MODE) AS summary_rel, 
MATCH(article) AGAINST ($query IN BOOLEAN MODE) AS article_rel 
FROM lm_blog AS blog
INNER JOIN lm_blog_tag_relationships AS rel 
ON blog.blog_id = rel.blog_id 
INNER JOIN lm_blog_tags AS tags 
ON rel.tag_id = tags.tag_id
WHERE MATCH(title, summary, article) AGAINST ($query IN BOOLEAN MODE)
GROUP BY blog.blog_id 
ORDER BY title_rel DESC, summary_rel DESC, article_rel DESC, blog.updated DESC

我尝试添加另一个WHERE子句来匹配聚合标记，但是你不能在where子句中使用组数据。据我所知，没有办法做WHERE OR HAVING ......

这是我得到的最接近但是它会检查WHERE和HAVING。我需要一个WHERE或HAVING

SELECT blog.blog_id, title, url, summary, 
GROUP_CONCAT(tags.tag SEPARATOR ':') AS tags, 
MATCH(title) AGAINST ($query IN BOOLEAN MODE) AS title_rel, 
MATCH(summary) AGAINST ($query IN BOOLEAN MODE) AS summary_rel, 
MATCH(article) AGAINST ($query IN BOOLEAN MODE) AS article_rel 
FROM lm_blog AS blog
INNER JOIN lm_blog_tag_relationships AS rel 
ON blog.blog_id = rel.blog_id 
INNER JOIN lm_blog_tags AS tags 
ON rel.tag_id = tags.tag_id
WHERE MATCH(title, summary, article) AGAINST($query IN BOOLEAN MODE)
GROUP BY blog.blog_id 
HAVING tags LIKE $query 
ORDER BY title_rel DESC, summary_rel DESC, article_rel DESC, blog.updated DESC

Answer 1

经过几个小时的搜索后找到答案......实际上很容易。只需选择带有标签的一个，然后选择一个带有全文搜索并使用UNION DISTINCT加入它们。

SELECT blog.blog_id, title, url, summary, updated, 
GROUP_CONCAT(tags.tag SEPARATOR ':') AS tags, 
MATCH(title) AGAINST ($query IN BOOLEAN MODE) AS title_rel, 
MATCH(summary) AGAINST ($query IN BOOLEAN MODE) AS summary_rel, 
MATCH(article) AGAINST ($query IN BOOLEAN MODE) AS article_rel 
FROM lm_blog AS blog
INNER JOIN lm_blog_tag_relationships AS rel 
ON blog.blog_id = rel.blog_id 
INNER JOIN lm_blog_tags AS tags 
ON rel.tag_id = tags.tag_id
WHERE MATCH(title, summary, article) AGAINST ($query IN BOOLEAN MODE) 
GROUP BY blog.blog_id 

UNION DISTINCT

SELECT blog.blog_id, title, url, summary, updated, 
GROUP_CONCAT(tags.tag SEPARATOR ':') AS tags,  
MATCH(title) AGAINST ($query IN BOOLEAN MODE) AS title_rel, 
MATCH(summary) AGAINST ($query IN BOOLEAN MODE) AS summary_rel, 
MATCH(article) AGAINST ($query IN BOOLEAN MODE) AS article_rel 
FROM lm_blog AS blog
INNER JOIN lm_blog_tag_relationships AS rel 
ON blog.blog_id = rel.blog_id 
INNER JOIN lm_blog_tags AS tags 
ON rel.tag_id = tags.tag_id
GROUP BY blog.blog_id 
HAVING tags REGEXP $query

ORDER BY title_rel DESC, summary_rel DESC, article_rel DESC, updated DESC

看起来我不能使用HAVING ... MATCH ... AGAINST ...所以我会使用正则表达式直到找到解决方案。

在SQL中进行博客搜索，在搜索中添加标签

1 个答案: