mysql怎么下载引擎 mysql下载教程图教程

如何更改mysql数据库引擎修改MySQL数据库引擎步骤如下
第一:修改my.ini,在[mysqld]下加上:
default-storage-engine=引擎名称
其中的等号后面是要指定的数据库引擎名称 。
第二:用sql语句修改已经建成表的引擎:
alter
table
tableName
type=InnoDB
--type语法在4.X版本下存在
alter
table
tableName
ENGINE=InnoDB
--5.X下都改成engine=innodb
举例说明下面贴出我的my.ini文件供参考:
[mysqld]
basedir=C:\Program
Files\VertrigoServ\Mysql\
datadir=C:\Program
Files\VertrigoServ\Mysql\data\
port
=3306
key_buffer
=64M
max_allowed_packet
=1M
table_cache
=128
sort_buffer_size
=512K
net_buffer_length
=8K
read_buffer_size
=256K
read_rnd_buffer_size
=512K
myisam_sort_buffer_size
=68M
default-storage-engine=INNODB
[mysqldump]
quick
max_allowed_packet
=116M
[mysql]
no-auto-rehash
#
Remove
the
next
comment
character
if
you
are
not
familiar
with
SQL
#safe-updates
[isamchk]
key_buffer
=20M
sort_buffer_size
=20M
read_buffer
=62M
write_buffer
=62M
[myisamchk]
key_buffer
=20M
sort_buffer_size
=20M
read_buffer
=62M
write_buffer
=62M
[mysqlhotcopy]
interactive-timeout
按照以上的代码提示操作 , 我们就能够成功地修改MySQL数据库引擎为INNODB了 。
linux下,我安装的mysql没有innodb引擎,怎么加上?首先确定,在mysql的'plugin_dir'下有ha_innodb_plugin.so和ha_innodb.so两个文件
查询'plugin_dir'的路径可以用以下命令
mysql
show
variables
like
'plugin_dir';
+---------------+-----------------------------------+
|
Variable_name
|
Value
|
+---------------+-----------------------------------+
|
plugin_dir
|
/usr/local/mysql/lib/mysql/plugin
|
+---------------+-----------------------------------+
1
row
in
set
(0.01
sec)
如果没有找到,在您的mysql编译目录里有下面的目录文件(内置的innodb和innodb_plugin)
storage/innobase/.libs/ha_innodb.so
storage/innodb_plugin/.libs/ha_innodb_plugin.so
您需要把它们(ha_innodb_plugin.so和ha_innodb.so)拷贝到mysql的plugin目录中(/usr/local/mysql/lib/mysql/plugin)
接下来就是在mysql命令行安装一下
#
mysql
Welcome
to
the
MySQL
monitor.
Commands
end
with
;
or
\g.
Your
MySQL
connection
id
is
18
Server
version:
5.1.36-log
Source
distribution
Type
'help;'
or
'\h'
for
help.
Type
'\c'
to
clear
the
current
input
statement.
mysql
show
engines;
+------------+---------+-----------------------------------------------------------+--------------+------+------------+
|
Engine
|
Support
|
Comment
|
Transactions
|
XA
|
Savepoints
|
+------------+---------+-----------------------------------------------------------+--------------+------+------------+
|
MRG_MYISAM
|
YES
|
Collection
of
identical
MyISAM
tables
|
NO
|
NO
|
NO
|
|
CSV
|
YES
|
CSV
storage

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