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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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Unicode error happens only for update from admin.py

I bumped into this error, when I am updating the column (datatype text) on django admin.py. unicode error happens only for update '\\xF0\\x9F\\x98\\xA1' for column 'object_repr' at row 1 This is because of UTF-8 problem,When I use 4byte character…
whitebear
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change mysql file format and collation

I need to apply this setting to MariaDB 5.5. Is it safe to do it on running DB? Will it affect only new databases or old DB in Latin1/nonUTF8 might be crashed? Of cource I will run full backup, but just want to know about others…
SeventhSon
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Why the result in the mysql is abnormal when the emoj is included in data?

enviroument : linux + node 0.10.22 + mysql 5.6.31 recently,there are some wrong result in my database. Normal results are json strings just like '{"content": "hello,world!", "sender":"warriorA"} '. Abnormal results are json strings like …
newgun
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utf8_unicode_ci: How to support expansions with "Like"?

It states in the docs: utf8_unicode_ci supports mappings such as expansions; that is, when one character compares as equal to combinations of other characters. For example, in German and some other languages “ß” is equal to “ss”. I tried this out…
Adam
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R to MySQL throws the error "could not run statement: Invalid utf8mb4 character string"

What is the best way to write Polish characters to MySQL using R? I tried to send an R data.frame to my local MySQL database. The data.frame includes Polish characters like ł. mydb = dbConnect(MySQL(), user='root', password='1234',…
Sebastian SEO
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Why is mysql generating garbled text with utf8mb4_unicode_ci collation?

I have a mediumtext column in a mysql database with a utf8mb4 collation: comments mediumtext utf8mb4_unicode_ci When I perform a mysql ENCODE the text is saved to the database column: INSERT INTO mytable VALUES (ENCODE('test', 'abc')); However,…
Matt
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How do I insert UTF-8 data into MySQL using Lucee?

I am trying to insert UTF-8 characters into a MySQL table using Lucee and having no luck. I have the MySQL table set to use utf8mb4_unicode_ci but have also tried utf8mb4_bin. I have tried Apache both with and without "AddDefaultCharset UTF-8"…
Jay2001
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How to enforce utf8mb4 on table creation with to_sql?

I'm importing some data from an API in Python, formatting it and saving it to a MySQL database with to_sql. results, types, valid = self.process_data(data, []) if valid: results.to_sql( con=self.db.connection, …
gucciontoast
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Does InnoDB stores multibyte strings in expanded form, in indexes?

Does InnoDB stores multibyte strings in expanded form, in indexes? For example, does each utf8mb4 string take 4 bytes? I've tried to test this empirically from information_schema.tables.index_length, however, the value is not deterministic, so it's…
Marcus
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Get exact filter results with charset utf8mb4

I want to match filter results exactly using CHARACTER SET utf8mb4. ALTER DATABASE test CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci; CREATE TABLE users ( username VARCHAR(25) NOT NULL, password VARCHAR(25) NULL NULL ) ENGINE=innodb…
lowdegeneration
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How can I set mysql character_set_database as utf8mb4 without changing the config file?(since I have no access to the files)

I am using AWS Lightsail MySQL and I'm trying to set the encoding as utf8mb4. I was able to set some variables using the command SET NAMES utf8mb4; ALTER DATABASE etl_db CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci; The result…
wwwwan
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Running into character issues while trying to migrate a PostgreSQL database to a MySQL database using MySQL Workbench

The PostgreSQL instance I'm using as my source database is using UTF-8 encoding and a cp1252 charset/collation. I'm trying to use a utf8mb4/utfmb4_unicode_520_ci charset/collation on my target database. I set all relevant server/client charset…
x n
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mysql [Row 1 was truncated; it contained more data than there were input columns] ERROR

my text file is like this. https://drive.google.com/open?id=1faW_OkO7_VoEQL_gndFIOrJv2e4Ycuzo and my table is here. CREATE TABLE news( num INT auto_increment primary key, link VARCHAR(150), date INT, title VARCHAR(150) unique, …
sang oh
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Work around the perl DBD::mysql UTF-8 bug

We have a software written in perl which retrieves data from a mysql database. For this we use the DBD::mysql interface We can retrieve all data correctly, the db is UTF8MB4 and the perl application uses UTF-8. The code to retrieve the sql result…
André Schild
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django inspectdb utf8mb4 error

Python manage.py inspectdb is giving following error even after all tables are having CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci from django.db import models Unable to inspect table 'execution' The error was: (3719, "3719: 'utf8' is currently an…
Jenish
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