工作中，不免会遇到前辈已经编译安装过的mysql，忽然发现mysql不支持innodb的存储引擎的问题，现在来看一下吧
一、先看mysql是否支持innodb存储引擎
mysql> show variables like 'ha%';
+----------------------+----------+
| Variable_name | Value |
+----------------------+----------+
| have_compress | YES |
| have_crypt | YES |
| have_csv | YES |
| have_dynamic_loading | YES |
| have_geometry | YES |
| have_innodb | DISABLED |
| have_ndbcluster | NO |
| have_openssl | DISABLED |
| have_partitioning | YES |
| have_profiling | YES |
| have_query_cache | YES |
| have_rtree_keys | YES |
| have_ssl | DISABLED |
| have_symlink | YES |
+----------------------+----------+
14 rows in set (0.00 sec)
have_innodb：值为DISABLED，表示未启用，值为no，表示不支持innodb存储引擎
mysql> show plugins;
+-----------------------+----------+----------------+---------+---------+
| Name | Status | Type | Library | License |
+-----------------------+----------+----------------+---------+---------+
| binlog | ACTIVE | STORAGE ENGINE | NULL | GPL |
| mysql_native_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| mysql_old_password | ACTIVE | AUTHENTICATION | NULL | GPL |
| MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| CSV | ACTIVE | STORAGE ENGINE | NULL | GPL |
| MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL |
| BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| FEDERATED | DISABLED | STORAGE ENGINE | NULL | GPL |
| PERFORMANCE_SCHEMA | ACTIVE | STORAGE ENGINE | NULL | GPL |
| ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL |
| partition | ACTIVE | STORAGE ENGINE | NULL | GPL |
+-----------------------+----------+----------------+---------+---------+
现在的mysql的确不支持innodb存储引擎
2.查看是否支持动态加载插件
mysql> show variables like 'have_dynamic%';
+----------------------+-------+
| Variable_name | Value |
+----------------------+-------+
| have_dynamic_loading | YES |
+----------------------+-------+
1 row in set (0.00 sec)
have_dynamic_loading：值为yes，表示动态加载mysql的插件
当使用源码编译安装时不能使用-with-mysqld-ldflags=all-static选项
3.放入插件文件，找到mysql存放插件的路径
mysql> show variables like 'plugin_dir';
+---------------+------------------------------+
| Variable_name | Value |
+---------------+------------------------------+
| plugin_dir | /usr/local/mysql/lib/plugin/ |
+---------------+------------------------------+
#在该目录中查看是否已有ha_innodb.so和ha_innodb_plugin.so两个文件
[root@zhu2 mysql-5.1.39]# ll /usr/local/mysql/lib/plugin/ha_innodb.so
lrwxrwxrwx 1 mysql mysql 18 08-22 02:55 /opt/mysql/lib/mysql/plugin/ha_innodb.so -> ha_innodb.so.0.0.0
[root@zhu2 mysql-5.1.39]# ll /usr/local/mysql/lib/plugin/ha_innodb_plugin.so
lrwxrwxrwx 1 mysql mysql 25 08-22 02:55 /opt/mysql/lib/mysql/plugin/ha_innodb_plugin.so -> ha_innodb_plugin.so.0.0.0
#若没有可以去网上下载与所安装mysql对应的版本，或者直接去mysql源码包中storage/innobase/.libs/ha_innodb.so
storage/innodb_plugin/.libs/ha_innodb_plugin.so 复制到mysql的plugin目录中
4.添加动态安装加载
mysql> INSTALL PLUGIN InnoDB SONAME 'ha_innodb.so';
Query OK, 0 rows affected (0.61 sec)
5.看现在是否支持innodb
mysql> show plugins;
+------------+--------+----------------+--------------+---------+
| Name | Status | Type | Library | License |
+------------+--------+--