无聊的关于有效配置文件路径的备忘
原来阿里云服务器的mysql 5.5 , 配置/etc/my.cnf是没有任何作用的,需要编辑/etc/mysql/my.cnf
妈的, 就是这一点让我测试了两天, 太无聊了
参考：http://stackoverflow.com/questions/1049728/how-do-i-see-what-character-set-a-mysql-database-table-column-is
创建数据库时指定字符集:
create database test DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
查看数据库的字符集：
SELECT TABLE_SCHEMA,
TABLE_NAME,
CCSA.CHARACTER_SET_NAME AS DEFAULT_CHAR_SET,
COLUMN_NAME,
COLUMN_TYPE,
C.CHARACTER_SET_NAME
FROM information_schema.TABLES AS T
JOIN information_schema.COLUMNS AS C USING (TABLE_SCHEMA, TABLE_NAME)
JOIN information_schema.COLLATION_CHARACTER_SET_APPLICABILITY AS CCSA
ON (T.TABLE_COLLATION = CCSA.COLLATION_NAME)
WHERE TABLE_SCHEMA=SCHEMA()
AND C.DATA_TYPE IN ('enum', 'varchar', 'char', 'text', 'mediumtext', 'longtext')
ORDER BY TABLE_SCHEMA,
TABLE_NAME,
COLUMN_NAME
;
修改数据库字符集：
alter database test character set utf8;
彻底删除apt-get autoremove --purge mysql-server-5.5
将以下内容添加到my.cnf
[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci
SO
[client]
default-character-set=utf8
[mysql]
default-character-set=utf8
[mysqld]
collation-server = utf8_unicode_ci
init-connect='SET NAMES utf8'
character-set-server = utf8
default-character-set = utf8
初始化命令
sudo echo -e "[mysqld]
character-set-server=utf8
collation-server=utf8_general_ci" >> /etc/my.cnf
Mysql配置文件的加载顺序是依次按照以下来的:
Linux:
/etc/my.cnf
/etc/mysql/my.cnf
/usr/etc/my.cnf
~/.my.cnf
Windows:
C:WINDOWSmy.ini
C:WINDOWSmy.cnf
C:my.ini
C:my.cnf
C:mysqlmy.ini
C:mysqlmy.cnf
一般来说, 编辑/etc/my.cnf或C:mysqlmy.ini这两个文件就ok了
#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html
# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
# Here is entries for some specific programs
# The following values assume you have at least 32M ram
# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
#
# * Basic Settings
#
user = mysql
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
lc-messages-dir = /usr/share/mysql
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address = 127.0.0.1
#
# * Fine Tuning
#
key_buffer = 16M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 8
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover = BACKUP
#max_connections = 100
#table_cache = 64
#thread_concurrency = 10
#
# * Query Cache Configuration
#
query_cache_limit = 1M
query_cache_size = 16M
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file = /var/log/mysql/mysql.log
#general_log = 1
#
# Error log - should be very few entries.
#
log_error = /var/log/mysql/error.log
#
# Here you can see queries with especially long duration
#log_slow_queries = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
# other settings you may need to change.
#server-id = 1
#log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 100M
#binlog_do_db = include_database_name
#binlog_ignore_db = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
[mysql]
#no-auto-rehash # faster start of mysql but no tab completition
[isamchk]
key_buffer = 16M
#
# * IMPORTANT: Additional settings that can override those from this file!
# The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/