标签：批量修改mysql 引擎
生产环境中如何批量修改MySQL引擎
一般来说这样的需求并不多见，但是偶尔也会有，在这里我们推荐使用sed对备份的内容进行引擎转换的方式，当然了，不要忘记修改my.cnf使之支持并能高效的使用对于的引用。
方法1
mysql命令语句修改
创建后引擎更改，5.0版本之后
alter table lvnian engine=innodb;
alter table lvnian engine=MyISAM;
其中lvnian是表名
更改实例
###################################
mysql> show create table test\G;
*************************** 1. row ***************************
Table: test
Create Table: CREATE TABLE `test` (
`id` int(4) NOT NULL AUTO_INCREMENT,
`name` char(20) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=301 DEFAULT CHARSET=latin1
1 row in set (0.00 sec)
ERROR:
No query specified
###################################
mysql> use lvnian;alter table test engine=MyISAM;
Database changed
Query OK, 300 rows affected (0.18 sec)
Records: 300 Duplicates: 0 Warnings: 0
mysql> show create table test\G;
*************************** 1. row ***************************
Table: test
Create Table: CREATE TABLE `test` (
`id` int(4) NOT NULL AUTO_INCREMENT,
`name` char(20) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=301 DEFAULT CHARSET=latin1
1 row in set (0.00 sec)
ERROR:
No query specified
mysql>
更改成功
################################################################
################################################################
批量更改的方法；
可以用脚本，先把每个表过来处理，再用一个for循环更改
#######
下面创建模拟使用
1、先创建lvnian数据库，再创建这个库中创建100 testN表
a.创建lvnian库
mysql -uroot -plvnian -e "show databases ;"
mysql -uroot -plvnian -e "create database lvnian; ;"
mysql -uroot -plvnian -e "show databases ;"
##############
[root@M_MYSQL /]# mysql -uroot -plvnian -e "show databases ;"
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
[root@M_MYSQL /]# mysql -uroot -plvnian -e "create database lvnian; ;"
[root@M_MYSQL /]# mysql -uroot -plvnian -e "show databases ;"
+--------------------+
| Database |
+--------------------+
| information_schema |
| lvnian |
| mysql |
| performance_schema |
| test |
+--------------------+
[root@M_MYSQL /]#
############################
############################
b、创建100个表
mysql -uroot -plvnian -e "use lvnian;show tables ;"
for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;create table test$n(id int(4) not null auto_increment,name char(20) not null,primary key(id));" ; done
mysql -uroot -plvnian -e "use lvnian;show tables ;"
############################
[root@M_MYSQL /]# mysql -uroot -plvnian -e "use lvnian;show tables ;"
[root@M_MYSQL /]# for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;create table test$n(id int(4) not null auto_increment,name char(20) not null,primary key(id));" ; done
[root@M_MYSQL /]# mysql -uroot -plvnian -e "use lvnian;show tables ;"
+------------------+
| Tables_in_lvnian |
+------------------+
| test1 |
| test10 |
| test100 |
| test11 |
| test12 |
| test13 |
...
...
...
| test95 |
| test96 |
| test97 |
| test98 |
| test99 |
+------------------+
[root@M_MYSQL /]#
##########################
##########################
c、查询这100个表的引擎是什么
查看一个表的默认引擎是什么
mysql -uroot -plvnian -e "use lvnian;show create table test1\G;"|awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘
##########################
[root@M_MYSQL /]# mysql -uroot -plvnian -e "use lvnian;show create table test1\G;"|awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘
------`test1`--------
ENGINE=InnoDB
[root@M_MYSQL /]#
####################################################
查看100个引擎的方法
for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;show create table test${n}\G;" |awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘ ; done
[root@M_MYSQL /]# for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;show create table test${n}\G;" |awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘ ; done
------`test1`--------
ENGINE=InnoDB
------`test2`--------
ENGINE=InnoDB
------`test3`--------
ENGINE=InnoDB
------`test4`--------
ENGINE=InnoDB
...
...
------`test96`--------
ENGINE=InnoDB
------`test97`--------
ENGINE=InnoDB
------`test98`--------
ENGINE=InnoDB
------`test99`--------
ENGINE=InnoDB
------`test100`--------
ENGINE=InnoDB
[root@M_MYSQL /]#
####################################################
####################################################
####################################################
####################################################
2、批量修改引擎
a、修改一个引擎的方法
mysql -uroot -plvnian -e "use lvnian;show create table test1\G;" |awk ‘/CREATE/{print $5} /ENGINE=/{print $2}‘
mysql -uroot -plvnian -e "use lvnian;use lvnian;alter table test1 engine=MyISAM;"
mysql -uroot -plvnian -e "use lvnian;show create table test1\G;" |awk ‘/CREATE/{print $5} /ENGINE=/{print $2}‘
##########################
[root@M_MYSQL /]# mysql -uroot -plvnian -e "use lvnian;show create table test1\G;" |awk ‘/CREATE/{print $5} /ENGINE=/{print $2}‘
`test1`
ENGINE=InnoDB
[root@M_MYSQL /]#
[root@M_MYSQL /]#
[root@M_MYSQL /]# mysql -uroot -plvnian -e "use lvnian;use lvnian;alter table test1 engine=MyISAM;"
[root@M_MYSQL /]# mysql -uroot -plvnian -e "use lvnian;show create table test1\G;" |awk ‘/CREATE/{print $5} /ENGINE=/{print $2}‘
`test1`
ENGINE=MyISAM
[root@M_MYSQL /]#
####################################################
修改100个引擎的方法
for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;show create table test${n}\G;" |awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘ ; done
for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;use lvnian;alter table test${n} engine=MyISAM;" ; done
for n in `seq 100`
do
mysql -uroot -plvnian -e "use lvnian;show create table test${n}\G;" |awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘ ; done
#########################
[root@M_MYSQL /]# for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;show create table test${n}\G;" |awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘ ; done
------`test1`--------
ENGINE=MyISAM
------`test2`--------
ENGINE=InnoDB
------`test3`--------
ENGINE=InnoDB
------`test4`--------
ENGINE=InnoDB
...
...
------`test96`--------
ENGINE=InnoDB
------`test97`--------
ENGINE=InnoDB
------`test98`--------
ENGINE=InnoDB
------`test99`--------
ENGINE=InnoDB
------`test100`--------
ENGINE=InnoDB
[root@M_MYSQL /]#
#############################
[root@M_MYSQL /]# for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;use lvnian;alter table test${n} engine=MyISAM;" ; done
[root@M_MYSQL /]#
#############################
[root@M_MYSQL /]# for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;show create table test${n}\G;" |awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘ ; done
------`test1`--------
ENGINE=MyISAM
------`test2`--------
ENGINE=MyISAM
------`test3`--------
ENGINE=MyISAM
------`test4`--------
ENGINE=MyISAM
...
...
------`test95`--------
ENGINE=MyISAM
------`test96`--------
ENGINE=MyISAM
------`test97`--------
ENGINE=MyISAM
------`test98`--------
ENGINE=MyISAM
------`test99`--------
ENGINE=MyISAM
------`test100`--------
ENGINE=MyISAM
[root@M_MYSQL /]#
#############################
修改N个引擎的方法
for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;show create table test${n}\G;" |awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘ ; done
for n in `seq 100` ; do mysql -uroot -plvnian -e "use lvnian;use lvnian;alter table test${n} engine=MyISAM;" ; done
for n in `seq 100`
do
mysql -uroot -plvnian -e "use lvnian;show create table test${n}\G;" |awk ‘/CREATE/{print "------"$5"--------"} /ENGINE=/{print $2}‘ ; done
本文出自 “奋斗吧” 博客，请务必保留此出处http://lvnian.blog.51cto.com/7155281/1699847
标签：批量修改mysql 引擎
原文地址：http://lvnian.blog.51cto.com/7155281/1699847
