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Questions tagged [utf8mb4]

Unlike its `utf8` encoding, MySQL’s `utf8mb4` encoding offers full Unicode support (including four-byte UTF-8-encoded symbols).

Unlike its utf8 encoding, MySQL’s utf8mb4 encoding offers full Unicode support (including four-byte UTF-8-encoded symbols).

The utf8mb4 character set is useful because nowadays we need support for storing not only language characters but also symbols, newly introduced emojis, and so on.

utf8mb4 has been available since MySQL 5.5.3 (released March 2010).

A nice read on How to support full Unicode in MySQL databases by Mathias Bynens can also shed some light on this.

More information about the utf8mb4 character set may be found on the official MySQL Documentation.

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MySQL don't want to store unicode character

Why won't MySQL store the unicode character ? Yes, it is a rare hieroglyph, you wouldn't see it in the browser. UTF16 is U+2B5EE Warning: #1366 Incorrect string value: '\xF0\xAB\x97\xAE' for column 'ch' at row 1 Is it possible to store this…
Qiao
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Characters appear as question marks in MySQL

I have a problem saving unicode characters in MySql. Initially my database character set was set to latin1 and unicode strings were saves as quotation marks. After doing some research I added the following lines to…
yinjia
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Can I safely use a utf8mb4 connection with utf8 columns?

I have some MySQL tables with utf8mb4 fields, and others with utf8. It is safe to use utf8mb4 in the PDO connection string for all tables? Or do I have to convert everything to utf8mb4, or start two different PDO connections? EDIT: The question is…
the_nuts
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mysql change innodb_large_prefix

I just setup debian 8.3 on a VM and installed xampp after this Tutorial. Everything is working, until I tried to create a new table: create table testtable ( id int(10) not null auto_increment, firstname varchar(255) collate utf8mb4_german2_ci…
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How to preserve UTF8mb4 data with mysqldump?

I'm using mysqldump to dump my database that contains UTF8MB4 columns with UTF8MB4 data. When I import this .sql file into a new database with UTF8MB4 support, all UTF8MB4 characters are converted into ????. Anybody got a clue about how to make…
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utf8mb4 in MySQL Workbench and JDBC

I've been working with a UTF-8 encoded MySQL DB that now needs to be able to store 4-byte emojis, so I decided to change from utf8 encoding to utf8mb4: ALTER DATABASE bstdb CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci; ALTER TABLE HISTORY…
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SQL doesnt differentiate u and ü although collation is utf8mb4_unicode_ci

In a table x, there is a column with the values u and ü. SELECT * FROM x WHERE column='u'. This returns u AND ü, although I am only looking for the u. The table's collation is utf8mb4_unicode_ci . Wherever I read about similar problems, everyone…
Jakob
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Google Cloud Sql Second Generation Utf8Mb4 Encoding

We are using Google Cloud Sql Second Generation with our AppEngine application. However today we've discovered some problem, we cannot insert emoji characters to our database because we cannot change some server flags to utf8mb4 character…
tolgatanriverdi
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How to insert emoji into MYSQL 5.5 and higher using Django ORM

I am trying to insert emoji's into a certain filed in my mysql table. I ran alter command and changed the collation to "utf8mb4_general_ci" ALTER TABLE XYZ MODIFY description VARCHAR(250) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci; Table…
Shrey
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iPhone emoticons insert into MySQL but become blank value

We are developing an iPhone app that would send emoticons from iPhone to server-side PHP and insert into MySQL tables. I am doing the server-side work. But after insert statement executed successfully, the inserted value become blank. What I could…
tech_me
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When to use utf8mb4 (bin, general_ci, unicode_520_ci)?

I'm confused about the MySQL Collations and its Encodings, People usualy uses one of these three collations: utf8mb_bin utf8mb4_general_ci utf8mb4_unicode_520_ci What I don't understand is when to use each of these collations when needed, Like for…
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JDBC and utf8mb4 encoding the emoji symbol

I use Mysql 5.7.18 and I faced an issue with emoji symbols when updating from JDBC. Table creation: body is typed utf8 and localizations is utf8mb4 CREATE TABLE `my_table` ( `body` TEXT NOT NULL, `localizations` TEXT CHARACTER SET utf8mb4…
awfun
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"Can't initialize character set utf8mb4" with Windows mysql-python

I'm getting an error try to connect to a remote mysql database from a Windows 7 client via python 2.7 + MySQLdb 1.2.5 + sqlalchemy 1.0.9. This is a result of recently changing the server's default character set to utf8mb4. The server is running…
Jugdish
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Running a rails migration overwrites my charset. Any ideas why?

I have everything set to utf8mb4 in my DB : mysql> show variables like "%character%";show variables like "%collation%"; +--------------------------+----------------------------+ | Variable_name | Value …
Trip
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update column collation with laravel

I have a case-insensitive collation column in my table. col_name : hash_id, collation : utf8mb4_unicode_ci I am getting results for yA2JeGs and YA2JeGs when I search for former only. So I need to update the collation to ensure case-sensitivity for…
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