那里有任何全文的MySQL专家吗?
昨天我写了一个问题,询问有关如何使用大量联接的全文搜索的任何建议,有点懒,我实际上没有尝试过。
从那以后,我自己很好地掌握了它,在我的全文字段中构建了一些成功的测试查询。如果我不使用任何连接,并单独查询每个字段,全文函数完美地工作,相关性/布尔值也很好,性能也很好......但是......只要我添加连接以运行完整查询,它永远运行。
任何人都可以在我的查询中发现任何可能导致这种情况发生的事情,因为作为业余爱好者,我真的看不到它!
SELECT
photos.photoID,
photos.headline,
photos.dateCreated,
MATCH (people.people) AGAINST ('+sarah +harding' IN BOOLEAN MODE) AS Rel1
FROM photos
LEFT JOIN ( photoPeople INNER JOIN people ON photoPeople.peopleID = people.PeopleID )
ON photos.photoID = photoPeople.photoID AND MATCH (people.people) AGAINST ('+sarah +harding' IN BOOLEAN MODE)
WHERE
photos.photoStatus = 'Live'
GROUP BY
photos.photoID
ORDER BY Rel1
这是我成功的个人查询之一:
SELECT
photoID,
headline,
dateCreated,
MATCH (caption) AGAINST ('+sarah +harding' IN BOOLEAN MODE) AS Relevance
FROM photos
WHERE
photoStatus = 'Live'
AND
MATCH (caption) AGAINST ('+sarah +harding' IN BOOLEAN MODE)
ORDER BY Relevance
这是数据库架构:
photos (tbl)
photoID INT(11) Primary Auto-Increment
headline Long-Text
caption Long-Text / FULLTEXT
dateCreated DateTime
people (tbl)
peopleID INT(11) Primary Auto-Increment
people VarChar(255) / FULLTEXT
photoPeople (tbl)
photoID INT(11)
peopleID INT(11)
keywords (tbl)
keywordID INT(11) Primary Auto-Increment
keyword VarChar(255) / FULLTEXT
photoKeyword (tbl)
photoID INT(11)
keywordID INT(11)
photoContributor (tbl)
photoID INT(11)
contributorRef VarChar(100) / FULLTEXT
这是我的EXPLAIN打印出来的:
id select_type table type possible_keys key key_len ref rows 1 SIMPLE photos ALL NULL NULL NULL NULL 89830 1 SIMPLE photoContributor ALL NULL NULL NULL NULL 149635 1 SIMPLE photoPeople ALL NULL NULL NULL NULL 110606 1 SIMPLE people eq_ref PRIMARY PRIMARY 4 1 1 SIMPLE photoKeyword ALL NULL NULL NULL NULL 699102 1 SIMPLE keywords eq_ref PRIMARY PRIMARY 4 1
我的网站访问者应该能够搜索: “Brad Pitt Angelina Jolie Dorchester Hotel太阳镜@MG” - 这应该从'people.people'表中找到“Brad Pitt”和“Angelina Jolie”,也可能找到'photos.caption'表。它还应该从'photos.caption'表中找到“Dorchester Hotel”,从'keywords.keyword'表中找到“Sunglasses”,最后,它应该在'photoContributor.contributorRef'表中找到“@MG”。
任何对此的帮助都会感激不尽......
答案 0 :(得分:3)
我建议使用单独的较小查询并使用UNION创建组合结果集。
这是另一个类似任务的问题。 Mysql Full text search across more than one table
<强>更新强>
SELECT "Photos" AS TableName, photoID AS ID, MATCH (caption) AGAINST ('+sarah +harding' IN BOOLEAN MODE) AS Relevance
FROM photos
UNION ALL
SELECT "People" AS TableName, peopleID AS ID, MATCH (people) AGAINST ('+sarah +harding' IN BOOLEAN MODE)
FROM people
UNION ALL
SELECT "Keyword" AS TableName, keywordID AS ID, MATCH (keyword) AGAINST ('+sarah +harding' IN BOOLEAN MODE)
FROM keyword
我真的不知道你有什么数据,但它会产生类似的东西:
表名 | ID |的关联强>
照片| 1 | 1
照片| 2 | 0
人物| 1 | 1
关键字| 10 | 1
您可以添加其他where子句以满足您的需求,但这是基本想法。
答案 1 :(得分:0)
我建议不使用MySQL并使用真正的FTS解决方案,例如Lucene,它通常与那些想要在MySQL中使用FTS的人结合使用。 https://stackoverflow.com/questions/553055/best-full-text-search-for-mysql