让我们看一个酒店表示例:
CREATE TABLE `hotels` (
`HotelNo` varchar(4) character set latin1 NOT NULL default '0000',`Hotel` varchar(80) character set latin1 NOT NULL default '',`City` varchar(100) character set latin1 default NULL,`CityFR` varchar(100) character set latin1 default NULL,`Region` varchar(50) character set latin1 default NULL,`RegionFR` varchar(100) character set latin1 default NULL,`Country` varchar(50) character set latin1 default NULL,`CountryFR` varchar(50) character set latin1 default NULL,`HotelText` text character set latin1,`HotelTextFR` text character set latin1,`tagsforsearch` text character set latin1,`tagsforsearchFR` text character set latin1,PRIMARY KEY (`HotelNo`),FULLTEXT KEY `fulltextHotelSearch` (`HotelNo`,`Hotel`,`City`,`CityFR`,`Region`,`RegionFR`,`Country`,`CountryFR`,`HotelText`,`HotelTextFR`,`tagsforsearch`,`tagsforsearchFR`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_german1_ci;
例如,在此表中,我们只有一家酒店,其地区名称=“Graubünden”(请注意umlautü字符)
现在,我想对短语进行相同的搜索匹配:
“ graubunden”和
“graubünden”
SELECT *
FROM `hotels`
WHERE `Region` LIKE CONVERT(_utf8 '%graubunden%' USING latin1)
COLLATE latin1_german1_ci
这对于“ graubunden”和“graubünden”工作正常,并且
结果我收到了适当的结果,但是问题是
当我们进行MysqL全文搜索时
此sql语句有什么问题?:
SELECT
*
FROM
hotels
WHERE
MATCH (`HotelNo`,`Address`,`tagsforsearchFR`)
AGAINST( CONVERT('+graubunden' USING latin1) COLLATE latin1_german1_ci IN BOOLEAN MODE)
ORDER BY Country ASC,Region ASC,City ASC
这不会返回任何结果.
有什么想法把狗埋在哪里吗?
最佳答案
为列定义单个CHARACTER SETS时,将覆盖在表级别设置为默认的排序规则.
您的每个列都有默认的latin1排序规则(即latin1_swedish_ci).您可以通过运行SHOW CREATE TABLE看到它.
在FULLTEXT查询中,索引列的COERCIBILITY为0,也就是说,所有全文查询都将转换为索引中使用的排序规则,反之亦然.
您需要从列中删除CHARACTER SET定义,或将所有列显式设置为latin1_german_ci:
CREATE TABLE `hotels` (
`HotelNo` varchar(4) NOT NULL default '0000',`Hotel` varchar(80) NOT NULL default '',`City` varchar(100) default NULL,`CityFR` varchar(100) default NULL,`Region` varchar(50) default NULL,`RegionFR` varchar(100) default NULL,`Country` varchar(50) default NULL,`CountryFR` varchar(50) default NULL,`HotelText` text,`HotelTextFR` text,`tagsforsearch` text,`tagsforsearchFR` text,`tagsforsearchFR`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_german1_ci;
INSERT
INTO hotels (hotelText,HotelTextFR,tagsforsearch,tagsforsearchFR)
VALUES ('text','text','graubünden','tags');
SELECT *
FROM hotels
WHERE MATCH (`HotelNo`,`tagsforsearchFR`)
AGAINST (CONVERT('+graubunden' USING latin1) COLLATE latin1_german1_ci IN BOOLEAN MODE)
ORDER BY
Country ASC,City ASC;