MySQL Regexp 是否支持 Unicode 匹配

Does MySQL Regexp support Unicode matching(MySQL Regexp 是否支持 Unicode 匹配)

问题描述

有谁知道Mysql的regexp是否支持unicode?我一直在做一些研究，大多数博客等似乎表明存在问题或不受支持.我想知道最好使用 LIKE 进行 unicode 模式匹配，使用 regexp 进行 ASCII 增强模式匹配吗?

我喜欢能够在字符串的开头或结尾搜索匹配项的想法，但是如果 regexp 不支持 unicode，那么如果我的文本是 unicode，这可能会很困难.

Does anyone know if Mysql's regexp supports unicode? I've been doing some research and the majority of blogs etc. seem to indicate that there is a problem or its not supported. I'm wondering then is it best to use LIKE for unicode pattern matching and regexp for ASCII enhanced pattern matching?

I Like the idea of being able to search for matches at the beginning or end of a string, but if regexp doesn't support unicode then this could be difficult if my text is unicode.

推荐答案

有谁知道Mysql的regexp是否支持unicode?我一直在做一些研究，大多数博客等似乎都表明存在问题或不支持.

Does anyone know if Mysql's regexp supports unicode? I've been doing some research and the majority of blogs etc. seem to indicate that there is a problem or its not supported.

如正则表达式所述:

REGEXP 和 RLIKE 运算符以字节方式工作，因此它们不是多字节安全的，可能会使用多字节字符集产生意外结果.此外，这些运算符按字节值比较字符，即使给定的排序规则将它们视为相等，重音字符也可能不相等.

Warning

The REGEXP and RLIKE operators work in byte-wise fashion, so they are not multi-byte safe and may produce unexpected results with multi-byte character sets. In addition, these operators compare characters by their byte values and accented characters may not compare as equal even if a given collation treats them as equal.

WHERE foo LIKE 'bar%'

WHERE foo LIKE '%bar'

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