How to display complicated Chinese character: Biang.

Inspired by this thread:
https://www.postgresql.org/message-id/011f01d8757e%24f5d69700%24e183c500%24%40ndensan.co.jp
Trying to display some special Chinese characters in Postgresql. For now I
am using postgresql 15 beta1. The OS is Ubuntu 20.

localhost:5433 admin(at)test=# show LC_COLLATE;
+------------+
| lc_collate |
+------------+
| C.UTF-8 |
+------------+

localhost:5433 admin(at)test=# select icu_unicode_version();

+---------------------+

| icu_unicode_version |

+---------------------+

| 13.0 |

+---------------------+

icu_unicode_version is the extension function.

Wiki about character Biang: https://en.wikipedia.org/wiki/Biangbiang_noodles

quote:

> The character's traditional and simplified forms were added to Unicode
> <https://en.wikipedia.org/wiki/Unicode> version 13.0 in March 2020 in the CJK
> Unified Ideographs Extension G
> <https://en.wikipedia.org/wiki/CJK_Unified_Ideographs_Extension_G> block
> of the newly allocated Tertiary Ideographic Plane
> <https://en.wikipedia.org/wiki/Tertiary_Ideographic_Plane>.[19]
> <https://en.wikipedia.org/wiki/Biangbiang_noodles#cite_note-20> The
> corresponding Unicode characters are:
>

Unicode character info: https://www.compart.com/en/unicode/U+30EDD

query

with strings(s) as (
> values (U&'\+0030EDD')
> )
> select s,
> octet_length(s),
> char_length(s),
> (select count(*) from icu_character_boundaries(s,'en')) as graphemes
> from strings;
>

return

+-----+--------------+-------------+-----------+
| s | octet_length | char_length | graphemes |
+-----+--------------+-------------+-----------+
| ロD | 4 | 2 | 2 |
+-----+--------------+-------------+-----------+

Seems not right. graphemes should be 1?
And I am not sure values (U&'\+0030EDD') is the same as 𰻝.

--
I recommend David Deutsch's <<The Beginning of Infinity>>

Jian