MySQL 8.0 FAQ: Connectors & APIs The  utf8  character set permits only  UTF-8  characters that take up to three bytes. This has led to reports such as that found in Bug #12600, which we rejected as “not a bug” . With  utf8 , MySQL must truncate an input string when it encounters bytes that it does no understand. Otherwise, it is unknown how long the bad multibyte character is. One possible workaround is to use  ucs2  instead of  utf8 , in which case the “bad”  characters are changed to question marks. However, no truncation takes place. You can also change the data type to  BLOB  or  BINARY , which perform no validity checking. No. The term “CJKV”  ( Chinese Japanese Korean Vietnamese ) refers to Vietnamese character sets which contain Han (originally Chinese) characters. MySQL supports the modern Vietnamese script with Western characters, but does not support the old Vietnamese script using Han characters. As of MySQL 5.6, there are Vietnamese collations for Unicode character sets, as described in Section 10.10.1, “Unicode Character Sets” . The Japanese translation of the MySQL 5.6 manual can be downloaded from https://dev.mysql.com/ doc/. The following resources are available: Yes. For common questions, issues, and answers relating to the MySQL Connectors and other APIs, see the following areas of the Manual: 5268 •MySQL Connector/J 8.0 Developer Guide •Connector/NET Programming •Connector/ODBC Notes and Tips •Common Problems with MySQL and PHP •Using C API Features •Visit the MySQL Character Sets, Collation, Unicode Forum. http://forums.mysql.com/ also provides foreign-language forums. •View feature requests relating to character set issues at http://tinyurl.com/y6xcuf. •A listing of MySQL user groups can be found at https://wikis.oracle.com/display/mysql/List+of +MySQL+User+Groups. •The  utf8mb4 ,  utf16 ,  utf16le , and  utf32  character sets support BMP characters, as well as supplementary characters outside the BMP. A.11.19. Where can I get help with CJK and related issues in MySQL? A.11.18. Where can I find translations of the MySQL Manual into Chinese, Japanese, and Korean? A.11.17. Does MySQL permit CJK characters to be used in database and table names? A.11.16. Should “CJK”  be “CJKV” ? A.12 MySQL 8.0 FAQ: Connectors & APIs