Question

怎么把数据库从InnoDB转成MyISAM-CSDN论坛

Answer 1

mysql 5.1默认只启用MyISAM, 使用INNODB要做一下修改:
=== InnoDB Storage Engine ===
Plugin Name: innobase
Description: Transactional Tables using InnoDB
Supports build: static and dynamic
Configurations: max, max-no-ndb
mysql 5.1版本之后，要使用innodb有两种方法
(1).静态编译的时候加入 --with-plugin-innobase
(2).动态扩展 启动mysqld后
mysql>INSTALL PLUGIN innodb SONAME 'ha_innodb.so'
mysql> show plugin
就可以看见了
动态的话plugin_dir要指定正确：
[mysqld]
plugin_dir=/path/to/plugin/directory
最后，通过动态方式，解决了这个转换问题。

查看mysql 5.1 是否安装了innodb插件(mysql 5.0使用: show variables like 'have_%';)
mysql> show plugins;
+------------+--------+----------------+--------------+---------+
| Name | Status | Type | Library | License |
+------------+--------+----------------+--------------+---------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |
| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL | |
+------------+--------+----------------+--------------+---------+
5 rows in set (0.00 sec)

发现没有安装 INNODB,执行下面语句：
mysql> install plugin innodb soname 'ha_innodb.so';
再次查看：
mysql> show plugins;
+------------+--------+----------------+--------------+---------+
| Name | Status | Type | Library | License |
+------------+--------+----------------+--------------+---------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |
| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| InnoDB | ACTIVE | STORAGE ENGINE | ha_innodb.so | GPL |
+------------+--------+----------------+--------------+---------+
6 rows in set (0.00 sec)
2. 查看表的类型：
mysql> use web_db;
mysql> show tablse;
随便找个表看类型：
mysql> show create table sys_user;

查看是否有以下字段：
ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8
如何将MyISAM库 导成 INNODB:
在备份出的 xxx.bak文件中 把 ENGINE=MyISAM 全换成 ENGINE=INNODB
再次导入就可以了。
转换表的命令:
alter table POD engine=innodb;