我知道我可以单独发出一个alter表,将表存储从MyISAM更改为InnoDB。
我想知道是否有一种方法可以快速将它们全部更改为InnoDB?
我知道我可以单独发出一个alter表,将表存储从MyISAM更改为InnoDB。
我想知道是否有一种方法可以快速将它们全部更改为InnoDB?
当前回答
在phpMyAdmin中使用此sql查询
SELECT CONCAT('ALTER TABLE ',table_schema,'.',table_name,' engine=InnoDB;')
FROM information_schema.tables
WHERE engine = 'MyISAM';
其他回答
当表很大时,最好从控制台进行操作
convert-to-innodb.sh
#!/usr/bin/env bash
# Usage: ./convert-to-innodb.sh 'db' 'user' 'password' | mysql 'db' -u user -p password
set -eu
db="$1"
user="$2"
pass="$3"
sql="SET @DATABASE_NAME = '${db}';"
sql+="SELECT CONCAT('ALTER TABLE \`', table_name, '\` ENGINE=InnoDB;') AS sql_statements
FROM information_schema.tables AS tb
WHERE table_schema = @DATABASE_NAME
AND \`ENGINE\` = 'MyISAM'
AND \`TABLE_TYPE\` = 'BASE TABLE'
ORDER BY table_name DESC;"
echo $sql | mysql -u${user} -p${pass} | tail -n +2
您可以用您最喜欢的脚本语言编写一个脚本来完成它。该脚本将执行以下操作:
Issue显示满表。对于返回的每一行,检查第二列是否显示为“BASE TABLE”而不是“VIEW”。如果它不是'VIEW',发出适当的ALTER TABLE命令。
下面是一个为Django用户提供的方法:
from django.core.management.base import BaseCommand
from django.db import connections
class Command(BaseCommand):
def handle(self, database="default", *args, **options):
cursor = connections[database].cursor()
cursor.execute("SHOW TABLE STATUS");
for row in cursor.fetchall():
if row[1] != "InnoDB":
print "Converting %s" % row[0],
result = cursor.execute("ALTER TABLE %s ENGINE=INNODB" % row[0])
print result
将它添加到你的应用程序的文件夹管理/命令/下,然后你可以用manage.py命令转换所有的表:
python manage.py convert_to_innodb
在mysql中,你可以使用文本编辑器进行搜索/替换:
SELECT table_schema, table_name FROM INFORMATION_SCHEMA.TABLES WHERE engine = 'myisam';
注意:你可能应该忽略information_schema和mysql,因为“mysql和information_schema数据库,实现了一些mysql内部,仍然使用MyISAM。特别是,你不能切换授权表来使用InnoDB。”(http://dev.mysql.com/doc/refman/5.5/en/innodb-default-se.html)
在任何情况下,请注意要忽略并运行的表:
SELECT table_name FROM INFORMATION_SCHEMA.TABLES WHERE engine = 'myisam';
现在只需复制/粘贴列表到你的文本编辑器,搜索/替换“|”与“ALTER TABLE”等。
然后你会有一个这样的列表,你可以简单地粘贴到你的mysql终端:
ALTER TABLE arth_commentmeta ENGINE=Innodb;
ALTER TABLE arth_comments ENGINE=Innodb;
ALTER TABLE arth_links ENGINE=Innodb;
ALTER TABLE arth_options ENGINE=Innodb;
ALTER TABLE arth_postmeta ENGINE=Innodb;
ALTER TABLE arth_posts ENGINE=Innodb;
ALTER TABLE arth_term_relationships ENGINE=Innodb;
ALTER TABLE arth_term_taxonomy ENGINE=Innodb;
ALTER TABLE arth_terms ENGINE=Innodb;
ALTER TABLE arth_usermeta ENGINE=Innodb;
如果你的文本编辑器不能很容易地做到这一点,这里有另一个解决方案,为一个类似的列表(你可以粘贴到mysql),你的数据库只有一个前缀,从linux终端:
mysql -u [username] -p[password] -B -N -e 'show tables like "arth_%"' [database name] | xargs -I '{}' echo "ALTER TABLE {} ENGINE=INNODB;"
遵循步骤:
Use MySql commands as follows, for converting to InnoDB (ALTER TABLE t1 ENGINE = InnoDB) or (ALTER TABLE t1 ENGINE = MyISAM) for MyISAM (You should do this for each individual tables, t1 is for the table name.). Write a script that loops on all tables and run the alter command Use an already available script to handle that: https://github.com/rafihaidari/convert-mysql-tables-storage-engine Try this SQL to Get all info will get all the tables information then you can change all the table from isam to InnoDB SELECT CONCAT('ALTER TABLE ',TABLE_NAME,' ENGINE=InnoDB;') FROM INFORMATION_SCHEMA.TABLES WHERE ENGINE='MyISAM' AND table_schema = 'your_DB_Name';