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
SELECT CONCAT('ALTER TABLE ',TABLE_NAME,' ENGINE=InnoDB;')
FROM INFORMATION_SCHEMA.TABLES
WHERE ENGINE='MyISAM'
AND table_schema = 'mydatabase';
效果非常好。
这将为您提供可以批处理运行的带有alter查询的所有表的列表
其他回答
<?php
// Convert all MyISAM tables to INNODB tables in all non-special databases.
// Note: With MySQL less than 5.6, tables with a fulltext search index cannot be converted to INNODB and will be skipped.
if($argc < 4)
exit("Usage: {$argv[0]} <host> <username> <password>\n");
$host = $argv[1];
$username = $argv[2];
$password = $argv[3];
// Connect to the database.
if(!mysql_connect($host, $username, $password))
exit("Error opening database. " . mysql_error() . "\n");
// Get all databases except special ones that shouldn't be converted.
$databases = mysql_query("SHOW databases WHERE `Database` NOT IN ('mysql', 'information_schema', 'performance_schema')");
if($databases === false)
exit("Error showing databases. " . mysql_error() . "\n");
while($db = mysql_fetch_array($databases))
{
// Select the database.
if(!mysql_select_db($db[0]))
exit("Error selecting database: {$db[0]}. " . mysql_error() . "\n");
printf("Database: %s\n", $db[0]);
// Get all MyISAM tables in the database.
$tables = mysql_query("SHOW table status WHERE Engine = 'MyISAM'");
if($tables === false)
exit("Error showing tables. " . mysql_error() . "\n");
while($tbl = mysql_fetch_array($tables))
{
// Convert the table to INNODB.
printf("--- Converting %s\n", $tbl[0]);
if(mysql_query("ALTER TABLE `{$tbl[0]}` ENGINE = INNODB") === false)
printf("--- --- Error altering table: {$tbl[0]}. " . mysql_error() . "\n");
}
}
mysql_close();
?>
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
一行:
mysql -u root -p dbName -e
"show table status where Engine='MyISAM';" | awk
'NR>1 {print "ALTER TABLE "$1" ENGINE = InnoDB;"}' |
mysql -u root -p dbName
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;"
cd / var / lib / mysql / DBNAME
Ls | grep ".frm" | cut -d"."-f1 | xargs -I{} -n1 mysql -D DBNAME -e "alter table {} ENGINE=INNODB;"-uroot -pXXXXX