On 1/21/10 10:27 AM, "John Campbell" <jcampbell1@stripped> wrote:
> I want to find rows that contain a word that matches a term, accent
> insensitive: I am using utf8-general collation everywhere.
>
> attempt 1:
> SELECT * FROM t WHERE txt LIKE '%que%'
> Matches que qué, but also matches 'queue'
>
> attempt 1.5:
> SELECT * FROM t WHERE txt LIKE '% que %' OR LIKE 'que %' OR LIKE '% que';
> Almost, but misses "que!" or 'que...'
>
> attempt2:
> SELECT * FROM t WHERE txt REGEXP '[[:<:]]que[[:>:]]'
> Matches que, not queue, but doesn't match qué.
>
> attempt3
> SELECT * FROM t WHERE txt REGEXP
>
> '[[:<:]]q[uùúûüũūŭůűųǔǖǘǚǜ][eèéêëēĕėęě][[:>:]]'
> Matches que, queue, qué. (I have no idea why this matches queue, but
> the Regex behavior is bizarre with unicode.)
>
> Does anyone know why the final regex acts weird?
"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." -- Mysql 11.4.2
> It there a good solution?
doesn't look like it.
Sphinxsearch might work nicely for you (it does for me) but that may not be
an option for you. i generated a Sphinxsearch charset_table config that
mimics utf8_general_ci collation.
