mySQL forcing utf-8 compliance for all connections.

Buzz — Wed, 12 Nov 2008 10:05:45 +0000

The problem that most people face when setting up a UTF-8 database in mySQL is that without calling ‘SET NAMES’ in the mySQL client prior to issuing any queries (PHP, C++ etc …) that the client connection will actually in most cases default to latin-1.

However as of mySQL 5.x or higher you can issue a statement in the my.cnf file calling init_connect.

This will trigger a series of defined commands / queries every time a non super user connects (So if you are using root to connect to your mySQL database, stop reading now and slap yourself HARD).

i.e.

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[mysqld]
init_connect='SET collation_connection = utf8_general_ci'
init_connect='SET NAMES utf8'
default-character-set=utf8
character-set-server=utf8
collation-server=utf8_general_ci
skip-character-set-client-handshake

UPDATE 04/09/09

my mySQL version 5.0.45 x64 only picks up the last entry of init_connect

Use this example in this case:

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[mysqld]
init_connect='SET collation_connection = utf8_general_ci; SET NAMES utf8;'
default-character-set=utf8
character-set-server=utf8
collation-server=utf8_general_ci

Restart mySQL and check the mysqld.log has not returned any errors (Or your event viewer if you are using windows).

Every client connection will now default to utf-8 encoding and not latin-1, removing the need to add a SET NAMES call on every connection.

This will work for PHP, C++, ruby etc… as the client encoding is now handeled server side, rather that waiting on the client to issue a SET NAMES command.

UPDATE 30/03/09: Added “skip-character-set-client-handshake” this ignores the clients request to set the connection charset, this info courtesy of “wardo” http://word.wardosworld.com/?p=164

UPDATE 10/09/09

Been having some issues with this working the workaround is to add this config as a single line:

1	init_connect='SET collation_connection = utf8_general_ci; SET NAMES utf8;'

Very basic C++ GDB tutorial

Buzz — Wed, 09 Apr 2008 20:13:36 +0000

a very basic video tutorial covering how to compile with debug information, load your app into gdb, set breakpoints and step through it.

No where near as much details as I wanted, but I never seem to get time to finish the full version, this will help in the interim.

NOTE: you will need XviD codec or use VLC.

If you re-distribute the video please give a link back (don’t force me to start water marking).

Saiweb » c++

mySQL forcing utf-8 compliance for all connections.

Very basic C++ GDB tutorial