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https://stackoverflow.com/questions/1997540/mysql-varchar-lengths-and-utf-8
@ButtleButkus " I believe the actual size of a VARCHAR(32) column would be 32x3+1=97 bytes" It would if you use utf8, but then you get broken Unicode support in MySQL. You should use utf8mb4 encoding instead, because there are max. 4 bytes in a utf-8 char, not 3 as in MySQL's variant of utf8...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode.html
The Unicode Standard includes characters from the Basic Multilingual Plane (BMP) and supplementary characters that lie outside the BMP. This section describes support for Unicode in MySQL. For information about the Unicode Standard itself, visit the Unicode Consortium website. BMP characters have these characteristics:
https://mathiasbynens.be/notes/mysql-utf8mb4
It doesn’t offer full Unicode support, which can lead to data loss or security vulnerabilities. MySQL’s utf8mb4. Luckily, MySQL 5.5.3 (released in early 2010) introduced a new encoding called utf8mb4 which maps to proper UTF-8 and thus fully supports Unicode, including astral symbols. Switching from MySQL’s utf8 to utf8mb4 Step 1: Create ...
https://lists.mysql.com/mysql/116499
MySQL does not seem to support the NVARCHAR (NATIONAL VARCHAR) short hand form SQL-92 standard for National (Unicode) data types I am testing on... Version = MySQL version 3.23.51 Platform = Windows NT SQL statement using NVARCHAR(x) column type that fails...
https://docs.moodle.org/en/MySQL_full_unicode_support
In Moodle 3.3, 3.4 and 3.5 a warning will show that the database isn't using full UTF-8 support and suggest moving to 'utf8mb4_unicode_ci', but you may choose to keep using 'utf8_*'. File format To allow for large indexes on columns that are a varchar, a combination of settings needs to be set.
http://tonyshowoff.com/articles/better-unicode-support-for-mysql-including-emoji/
Better Unicode support for MySQL (including emoji) ... I said it. However, when it comes to support in MySQL, things get a little bit murky. I never had too much of an issue ... (or 1000) so what's the deal?Well, not so fast there, Professor.MySQL doesn't count literal bytes in VARCHAR when it comes to Unicode, rather potential Unicode bytes ...
https://lists.mysql.com/mysql/116585
Smith, Tuesday, August 06, 2002, 6:41:05 PM, you wrote: S> MySQL does not seem to support the NVARCHAR (NATIONAL VARCHAR) short hand form > SQL-92 standard for National (Unicode) data types S> I am testing on... S> Version = MySQL version 3.23.51 S> Platform = Windows NT S> SQL statement using NVARCHAR(x) column type that fails...
https://bugs.mysql.com/bug.php?id=69620
Description: MySQL Workbench does not have support for nvarchar and national varchar field types. For my project I need complete DB support for unicode charset and therefore these data types are needed urgently. I tried adding my own type but no success.
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