| From: | "Daniel Verite" <daniel(at)manitou-mail(dot)org> |
|---|---|
| To: | "Thomas Munro" <thomas(dot)munro(at)gmail(dot)com> |
| Cc: | 荒井元成 <n2029(at)ndensan(dot)co(dot)jp>, Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Unicode Variation Selector and Combining character |
| Date: | 2022-06-01 09:45:47 |
| Message-ID: | ebc75546-2409-4e9e-8275-fc74d1a76b31@manitou-mail.org |
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| Lists: | pgsql-hackers |
Thomas Munro wrote:
> Looking around a bit, it might be interesting to check if the
> icu_character_boundaries() function in Daniel Vérité's icu_ext treats
> IVSs as single grapheme clusters.
It does.
with strings(s) as (
values (U&'\+0066FE' || U&'\+0E0103'),
(U&'\+00304B' || U&'\+00309A')
)
select s,
octet_length(s),
char_length(s),
(select count(*) from icu_character_boundaries(s,'en')) as graphemes
from strings;
s | octet_length | char_length | graphemes
-----+--------------+-------------+-----------
曾󠄃 | 7 | 2 | 1
か゚ | 6 | 2 | 1
Best regards,
--
Daniel Vérité
https://postgresql.verite.pro/
Twitter: @DanielVerite
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