MySQL的对阵没有返回区分大小写的结果

Question

我有两个表：

CREATE TABLE IF NOT EXISTS `test1` (
    `id` int(10) unsigned NOT NULL AUTO_INCREMENT, 
    `bucket_id` int(10) unsigned NOT NULL COMMENT 'folder this component belongs to', 
    `test1_name` varchar(81) NOT NULL COMMENT 'Name of this component', 
    `test1_desc` varchar(1024) NOT NULL COMMENT 'Component Description', 
    PRIMARY KEY (`id`), 
    FULLTEXT KEY `test1_search` (`test1_name`,`test1_desc`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ; 

CREATE TABLE IF NOT EXISTS `bucket` (
    `id` int(10) unsigned NOT NULL AUTO_INCREMENT, 
    `bkt_name` varchar(81) NOT NULL COMMENT 'The name of this bucket', 
    `bkt_desc` varchar(1024) NOT NULL COMMENT 'A description of this bucket', 
    `bkt_keywords` varchar(512) DEFAULT NULL COMMENT 'keywords for searches', 
    PRIMARY KEY (`id`), 
    FULLTEXT KEY `fldr_search` (`bkt_desc`,`bkt_keywords`,`bkt_name`) 
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=8 ; 

桶仅仅是一个持有人在test1的包含所有将进入桶中的东西。例如：

INSERT INTO `bucket` (`id`, `bkt_name`, `bkt_desc`, `bkt_keywords`) VALUES 
(1, 'Simpsons', 'The Simpsons Cartoon Family was first successful adult cartoon series', 'Homer, Marge, Lisa and Bart'), 
(2, 'Griffins', 'The family from the popular family guy series', 'Peter, Lois, Meg, Chris, Stewie, Brian'); 

INSERT INTO `test1` (`id`, `bucket_id`, `bkt_name`, `bkt_desc`) VALUES 
(1, 1, 'Homer Simpson', 'Homer the figurative head of the Simpsons Family and is the husband of Marge'), 
(2, 2, 'Peter Griffin', 'Peter the figurative head of the Griffin family on the hit TV seriers The family Guy'); 

现在，使用下面的查询我想看看他的名字，描述或关键字包含搜索项目“家庭”或者其成分包含单词“家庭”）

所有桶到目前为止，我所拥有的就是这个查询，并且它没有返回混合大小写结果，因为在“family”中找不到“Family”。

SELECT * 
FROM bucket 
RIGHT JOIN test1 ON test1.bucket_id = bucket.id 
WHERE 
    bucket.isvisible > 0 AND 
    MATCH(bucket.bkt_keywords, bucket.bkt_desc, bucket.bkt_name) 
    AGAINST('family' IN BOOLEAN MODE) OR 
    MATCH(test1.test1_name, test1.test1_desc) 
    AGAINST('family' IN BOOLEAN MODE) 

我还应该补充说，所有文本字段都具有utf8_general_ci的排序规则，就像整个MyISAM表一样。

Answer 1

答案显然是增加一些parens围绕两个比赛对子句。

SELECT * 
FROM bucket 
RIGHT JOIN test1 ON test1.bucket_id = bucket.id 
WHERE bucket.isvisible > 0 AND 
(MATCH(bucket.bkt_keywords, bucket.bkt_desc, bucket.bkt_name) 
    AGAINST('family' IN BOOLEAN MODE) OR 
    MATCH(test1.test1_name, test1.test1_desc) 
    AGAINST('family' IN BOOLEAN MODE)) 

Answer 2

我认为你的表不使用utf8_general_ci作为整理，但是utf8_bin。我能够重现修改表之后，你的行为描述如下：

ALTER TABLE test1 CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin; 
ALTER TABLE bucket CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin; 

你或许应该明确地设置你的表的排序规则：

ALTER TABLE test1 CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci; 
ALTER TABLE bucket CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci; 

如果上述改变任何东西，我猜想您的服务器或会话实际上被设置为默认使用其他排序规则（因为排序规则未在您的表定义中指定）。这可以检查：

SHOW GLOBAL VARIABLES LIKE 'collation_server'; 
SHOW SESSION VARIABLES LIKE 'collation_server';