1 [root@zhang ~]# cat /etc/redhat-release # 也可以使用其他版本
2 CentOS Linux release 7.4.1708 (Core)
3 [root@zhang ~]# yum install -y mariadb mariadb-server # CentOS7的mysql数据库为mariadb
4 ………………
5 [root@zhang ~]# systemctl enable mariadb.service # 开机自启动mariadb
6 Created symlink from /etc/systemd/system/multi-user.target.wants/mariadb.service to /usr/lib/systemd/system/mariadb.service.
7 [root@zhang ~]# systemctl start mariadb.service # 启动mariadb
8 [root@zhang ~]# systemctl status mariadb.service # 查看mariadb服务状态
9 ● mariadb.service - MariaDB database server
10 Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)
11 Active: active (running) since Wed 2018-05-23 17:13:35 CST; 6s ago
12 Process: 1755 ExecStartPost=/usr/libexec/mariadb-wait-ready $MAINPID (code=exited, status=0/SUCCESS)
13 Process: 1675 ExecStartPre=/usr/libexec/mariadb-prepare-db-dir %n (code=exited, status=0/SUCCESS)
14 ………………
MariaDB [(none)]> select version();
+----------------+
| version() |
+----------------+
| 5.5.56-MariaDB |
+----------------+
1 row in set (0.00 sec)
1 MariaDB [(none)]> show CHARACTER SET;
2 ## 字符集 描述 默认校对规则 最大长度
3 +----------+-----------------------------+---------------------+--------+
4 | Charset | Description | Default collation | Maxlen |
5 +----------+-----------------------------+---------------------+--------+
6 | big5 | Big5 Traditional Chinese | big5_chinese_ci | 2 |
7 | dec8 | DEC West European | dec8_swedish_ci | 1 |
8 | cp850 | DOS West European | cp850_general_ci | 1 |
9 | hp8 | HP West European | hp8_english_ci | 1 |
10 | koi8r | KOI8-R Relcom Russian | koi8r_general_ci | 1 |
11 | latin1 | cp1252 West European | latin1_swedish_ci | 1 |
12 | latin2 | ISO 8859-2 Central European | latin2_general_ci | 1 |
13 | swe7 | 7bit Swedish | swe7_swedish_ci | 1 |
14 | ascii | US ASCII | ascii_general_ci | 1 |
15 | ujis | EUC-JP Japanese | ujis_japanese_ci | 3 |
16 | sjis | Shift-JIS Japanese | sjis_japanese_ci | 2 |
17 | hebrew | ISO 8859-8 Hebrew | hebrew_general_ci | 1 |
18 | tis620 | TIS620 Thai | tis620_thai_ci | 1 |
19 | euckr | EUC-KR Korean | euckr_korean_ci | 2 |
20 | koi8u | KOI8-U Ukrainian | koi8u_general_ci | 1 |
21 | gb2312 | GB2312 Simplified Chinese | gb2312_chinese_ci | 2 |
22 | greek | ISO 8859-7 Greek | greek_general_ci | 1 |
23 | cp1250 | Windows Central European | cp1250_general_ci | 1 |
24 | gbk | GBK Simplified Chinese | gbk_chinese_ci | 2 |
25 | latin5 | ISO 8859-9 Turkish | latin5_turkish_ci | 1 |
26 | armscii8 | ARMSCII-8 Armenian | armscii8_general_ci | 1 |
27 | utf8 | UTF-8 Unicode | utf8_general_ci | 3 |
28 | ucs2 | UCS-2 Unicode | ucs2_general_ci | 2 |
29 | cp866 | DOS Russian | cp866_general_ci | 1 |
30 | keybcs2 | DOS Kamenicky Czech-Slovak | keybcs2_general_ci | 1 |
31 | macce | Mac Central European | macce_general_ci | 1 |
32 | macroman | Mac West European | macroman_general_ci | 1 |
33 | cp852 | DOS Central European | cp852_general_ci | 1 |
34 | latin7 | ISO 8859-13 Baltic | latin7_general_ci | 1 |
35 | utf8mb4 | UTF-8 Unicode | utf8mb4_general_ci | 4 |
36 | cp1251 | Windows Cyrillic | cp1251_general_ci | 1 |
37 | utf16 | UTF-16 Unicode | utf16_general_ci | 4 |
38 | cp1256 | Windows Arabic | cp1256_general_ci | 1 |
39 | cp1257 | Windows Baltic | cp1257_general_ci | 1 |
40 | utf32 | UTF-32 Unicode | utf32_general_ci | 4 |
41 | binary | Binary pseudo charset | binary | 1 |
42 | geostd8 | GEOSTD8 Georgian | geostd8_general_ci | 1 |
43 | cp932 | SJIS for Windows Japanese | cp932_japanese_ci | 2 |
44 | eucjpms | UJIS for Windows Japanese | eucjpms_japanese_ci | 3 |
45 +----------+-----------------------------+---------------------+--------+
46 39 rows in set (0.00 sec)
MariaDB [(none)]> show variables like '%character_set%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 | ## 客户端来源数据使用的字符集
| character_set_connection | utf8 | ## 连接层字符集
| character_set_database | latin1 | ## 当前选中数据库的默认字符集
| character_set_filesystem | binary |
| character_set_results | utf8 | ## 查询结果返回字符集
| character_set_server | latin1 | ## 默认的内部操作字符集【服务端(数据库)字符】
| character_set_system | utf8 | ## 系统元数据(字段名等)字符集【Linux系统字符集】
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.00 sec)
1 [root@zhang ~]# vim /etc/my.cnf
2 [client]
3 default-character-set=utf8
4
5 [mysqld]
6 character-set-server=utf8
7 datadir=/var/lib/mysql
8 socket=/var/lib/mysql/mysql.sock
9 # Disabling symbolic-links is recommended to prevent assorted security risks
10 symbolic-links=0
11 # Settings user and group are ignored when systemd is used.
12 # If you need to run mysqld under a different user or group,
13 # customize your systemd unit file for mariadb according to the
14 # instructions in http://fedoraproject.org/wiki/Systemd
15
16 [mysqld_safe]
17 log-error=/var/log/mariadb/mariadb.log
18 pid-file=/var/run/mariadb/mariadb.pid
19
20 #
21 # include all files from the config directory
22 #
23 !includedir /etc/my.cnf.d
24
25 [root@zhang ~]# systemctl restart mariadb.service # 重启mariadb
26
27 # 字符集查看
28 MariaDB [(none)]> show variables like '%character_set%';
29 +--------------------------+----------------------------+
30 | Variable_name | Value |
31 +--------------------------+----------------------------+
32 | character_set_client | utf8 |
33 | character_set_connection | utf8 |
34 | character_set_database | utf8 |
35 | character_set_filesystem | binary |
36 | character_set_results | utf8 |
37 | character_set_server | utf8 |
38 | character_set_system | utf8 |
39 | character_sets_dir | /usr/share/mysql/charsets/ |
40 +--------------------------+----------------------------+
41 8 rows in set (0.00 sec)
MariaDB [(none)]> create database zhangtest01;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]> show create database zhangtest01;
+-------------+----------------------------------------------------------------------+
| Database | Create Database |
+-------------+----------------------------------------------------------------------+
| zhangtest01 | CREATE DATABASE `zhangtest01` /*!40100 DEFAULT CHARACTER SET utf8 */ |
+-------------+----------------------------------------------------------------------+
1 row in set (0.00 sec)
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
| zhangtest01 |
+--------------------+
5 rows in set (0.00 sec)
1 MariaDB [(none)]> grant all on zhangtest01.* to zhang01@'%' identified by 'zhang01'; # 错误授权【大表操作时会失败】
2 Query OK, 0 rows affected (0.00 sec)
3
4 MariaDB [(none)]> grant all on *.* to zhang06@'%' identified by 'zhang06'; # 正确授权
5 Query OK, 0 rows affected (0.00 sec)
6
7 MariaDB [(none)]> flush privileges; # 刷新权限
8 Query OK, 0 rows affected (0.00 sec)
9
10 MariaDB [(none)]> show grants for zhang01@'%' ;
11 +--------------------------------------------------------------------------------------------------------+
12 | Grants for zhang01@% |
13 +--------------------------------------------------------------------------------------------------------+
14 | GRANT USAGE ON *.* TO 'zhang01'@'%' IDENTIFIED BY PASSWORD '*4D6E977808109CE3DEEDEDA4E3EA17CE0F9CC8C1' |
15 | GRANT ALL PRIVILEGES ON `zhangtest01`.* TO 'zhang01'@'%' |
16 +--------------------------------------------------------------------------------------------------------+
17 2 rows in set (0.00 sec)
18
19 MariaDB [(none)]> show grants for zhang06@'%' ;
20 +-----------------------------------------------------------------------------------------------------------------+
21 | Grants for zhang06@% |
22 +-----------------------------------------------------------------------------------------------------------------+
23 | GRANT ALL PRIVILEGES ON *.* TO 'zhang06'@'%' IDENTIFIED BY PASSWORD '*45D6EF2FFF78EB89123D0056C9AE2FC6BA6DA0E7' |
24 +-----------------------------------------------------------------------------------------------------------------+
25 1 row in set (0.00 sec)
26
27 mysql> show variables like '%connect%';
28 +--------------------------+-----------------+
29 | Variable_name | Value |
30 +--------------------------+-----------------+
31 | character_set_connection | utf8 |
32 | collation_connection | utf8_general_ci |
33 | connect_timeout | 10 |
34 | extra_max_connections | 1 |
35 | init_connect | |
36 | max_connect_errors | 10 |
37 | max_connections | 151 |
38 | max_user_connections | 0 |
39 +--------------------------+-----------------+
40 8 rows in set (0.00 sec)
41
42 mysql> show status like '%connect%'; # 连接信息
43 +--------------------------+-------+
44 | Variable_name | Value |
45 +--------------------------+-------+
46 | Aborted_connects | 11 |
47 | Connections | 36 |
48 | Max_used_connections | 9 |
49 | Ssl_client_connects | 0 |
50 | Ssl_connect_renegotiates | 0 |
51 | Ssl_finished_connects | 0 |
52 | Threads_connected | 5 |
53 +--------------------------+-------+
54 7 rows in set (0.00 sec)
CREATE TABLE `zhang_test` (
`id` int(10) NOT NULL,
`name` varchar(50) NOT NULL,
`address` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `zhangtest01`.`zhang_test` (`id`, `name`, `address`) VALUES ('0', 'test0', '中国XX省XX市0');
[root@zhang database]# vim batch_insert.sh
#!/bin/sh
for i in `echo {1..2000000}`;do
echo "INSERT INTO zhangtest01.zhang_test (id, name, address) VALUES ('${i}', 'test${i}', '中国XX省XX市${i}'); "
done
执行脚本将插入数据放到一个文本中,之后导入数据库即可
# 官网下载
[root@zhang tools]# wget https://www.percona.com/downloads/percona-toolkit/3.0.10/binary/redhat/7/x86_64/percona-toolkit-3.0.10-1.el7.x86_64.rpm
………………
[root@zhang tools]# yum install -y percona-toolkit-3.0.10-1.el7.x86_64.rpm
………………
[root@docker01 tools]# pt-online-schema-change --help # 帮助文档
………………
1 [root@docker01 tools]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --nodrop-old-table --charset=UTF8 --max-load="Threads_running=1000" --alter "add uuid varchar(100) NOT NULL DEFAULT '0' COMMENT 'UUID' after id" D=zhangtest01,t=zhang_test --execute # 语句
2 No slaves found. See --recursion-method if host zhang has slaves.
3 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
4 Operation, tries, wait:
5 analyze_table, 10, 1
6 copy_rows, 10, 0.25
7 create_triggers, 10, 1
8 drop_triggers, 10, 1
9 swap_tables, 10, 1
10 update_foreign_keys, 10, 1
11 Altering `zhangtest01`.`zhang_test`...
12 Creating new table...
13 Created new table zhangtest01._zhang_test_new OK.
14 Altering new table...
15 Altered `zhangtest01`.`_zhang_test_new` OK.
16 2018-05-23T13:02:13 Creating triggers...
17 2018-05-23T13:02:13 Created triggers OK.
18 2018-05-23T13:02:13 Copying approximately 2006480 rows...
19 Copying `zhangtest01`.`zhang_test`: 74% 00:10 remain
20 2018-05-23T13:02:21 Copied rows OK.
21 2018-05-23T13:02:21 Swapping tables...
22 2018-05-23T13:02:21 Swapped original and new tables OK.
23 Not dropping old table because --no-drop-old-table was specified.
24 2018-05-23T13:02:21 Dropping triggers...
25 2018-05-23T13:02:21 Dropped triggers OK.
26 Successfully altered `zhangtest01`.`zhang_test`.
CREATE TABLE `zhang_test` (
`id` int(10) NOT NULL,
`uuid` varchar(100) NOT NULL DEFAULT '0' COMMENT 'UUID',
`name` varchar(50) NOT NULL,
`address` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--nocheck-replication-filters
不检查复制过滤器【有主从复制也照样执行】
--[no]drop-old-table
操作完后是否删除原始表【默认TRUE】
--critical-load="Threads_running=1000" # 终止拷贝【不优先使用】
类似于--max-load,不同的是检测到超高负载时会直接中断OSC进程而不是暂停
--max-load="Threads_running=1000" # 暂停拷贝【优先使用】
默认如果检测到服务器负载过重会暂停操作
检查每个块后显示全局状态,如果负载太高暂停(默认Threads_running=25)
D=zhangtest01
操作的哪个数据库
t=zhang_test
操作哪张表
--execute
执行操作
1 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --charset=UTF8 --max-load="Threads_running=1000" --alter "MODIFY uuid varchar(80)" D=zhangtest01,t=zhang_test --execute
2 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --charset=UTF8 --max-load="Threads_running=1000" --alter "MODIFY uuid int(11)" D=zhangtest01,t=zhang_test --execute
3 No slaves found. See --recursion-method if host zhang has slaves.
4 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
5 Operation, tries, wait:
6 analyze_table, 10, 1
7 copy_rows, 10, 0.25
8 create_triggers, 10, 1
9 drop_triggers, 10, 1
10 swap_tables, 10, 1
11 update_foreign_keys, 10, 1
12 Altering `zhangtest01`.`zhang_test`...
13 Creating new table...
14 Created new table zhangtest01._zhang_test_new OK.
15 Altering new table...
16 Altered `zhangtest01`.`_zhang_test_new` OK.
17 2018-05-23T22:11:15 Creating triggers...
18 2018-05-23T22:11:15 Created triggers OK.
19 2018-05-23T22:11:15 Copying approximately 2005915 rows...
20 2018-05-23T22:11:22 Copied rows OK.
21 2018-05-23T22:11:22 Swapping tables...
22 2018-05-23T22:11:22 Swapped original and new tables OK.
23 2018-05-23T22:11:22 Dropping old table...
24 2018-05-23T22:11:22 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
25 2018-05-23T22:11:22 Dropping triggers...
26 2018-05-23T22:11:22 Dropped triggers OK.
27 Successfully altered `zhangtest01`.`zhang_test`.
1 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --charset=UTF8 --max-load="Threads_running=1000" --alter "DROP uuid" D=zhangtest01,t=zhang_test --execute
2 No slaves found. See --recursion-method if host zhang has slaves.
3 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
4 Operation, tries, wait:
5 analyze_table, 10, 1
6 copy_rows, 10, 0.25
7 create_triggers, 10, 1
8 drop_triggers, 10, 1
9 swap_tables, 10, 1
10 update_foreign_keys, 10, 1
11 Altering `zhangtest01`.`zhang_test`...
12 Creating new table...
13 Created new table zhangtest01._zhang_test_new OK.
14 Altering new table...
15 Altered `zhangtest01`.`_zhang_test_new` OK.
16 2018-05-23T22:04:38 Creating triggers...
17 2018-05-23T22:04:38 Created triggers OK.
18 2018-05-23T22:04:38 Copying approximately 1996965 rows...
19 2018-05-23T22:04:47 Copied rows OK.
20 2018-05-23T22:04:47 Swapping tables...
21 2018-05-23T22:04:47 Swapped original and new tables OK.
22 2018-05-23T22:04:47 Dropping old table...
23 2018-05-23T22:04:47 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
24 2018-05-23T22:04:47 Dropping triggers...
25 2018-05-23T22:04:47 Dropped triggers OK.
26 Successfully altered `zhangtest01`.`zhang_test`.
1 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --charset=UTF8 --max-load="Threads_running=1000" --alter "ADD INDEX index_name(name)" D=zhangtest01,t=zhang_test --execute # ADD INDEX indexName(columnName)
2 No slaves found. See --recursion-method if host zhang has slaves.
3 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
4 Operation, tries, wait:
5 analyze_table, 10, 1
6 copy_rows, 10, 0.25
7 create_triggers, 10, 1
8 drop_triggers, 10, 1
9 swap_tables, 10, 1
10 update_foreign_keys, 10, 1
11 Altering `zhangtest01`.`zhang_test`...
12 Creating new table...
13 Created new table zhangtest01._zhang_test_new OK.
14 Altering new table...
15 Altered `zhangtest01`.`_zhang_test_new` OK.
16 2018-05-23T22:16:59 Creating triggers...
17 2018-05-23T22:16:59 Created triggers OK.
18 2018-05-23T22:16:59 Copying approximately 2013664 rows...
19 2018-05-23T22:17:12 Copied rows OK.
20 2018-05-23T22:17:12 Swapping tables...
21 2018-05-23T22:17:12 Swapped original and new tables OK.
22 2018-05-23T22:17:12 Dropping old table...
23 2018-05-23T22:17:12 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
24 2018-05-23T22:17:12 Dropping triggers...
25 2018-05-23T22:17:12 Dropped triggers OK.
26 Successfully altered `zhangtest01`.`zhang_test`.
CREATE TABLE `zhang_test` (
`id` int(10) NOT NULL,
`uuid` int(11) DEFAULT NULL,
`name` varchar(50) NOT NULL,
`address` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `index_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
1 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --charset=UTF8 --max-load="Threads_running=1000" --alter "DROP INDEX index_name" D=zhangtest01,t=zhang_test --execute # DROP INDEX indexName
2 No slaves found. See --recursion-method if host zhang has slaves.
3 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
4 Operation, tries, wait:
5 analyze_table, 10, 1
6 copy_rows, 10, 0.25
7 create_triggers, 10, 1
8 drop_triggers, 10, 1
9 swap_tables, 10, 1
10 update_foreign_keys, 10, 1
11 Altering `zhangtest01`.`zhang_test`...
12 Creating new table...
13 Created new table zhangtest01._zhang_test_new OK.
14 Altering new table...
15 Altered `zhangtest01`.`_zhang_test_new` OK.
16 2018-05-23T22:19:31 Creating triggers...
17 2018-05-23T22:19:31 Created triggers OK.
18 2018-05-23T22:19:31 Copying approximately 2005445 rows...
19 2018-05-23T22:19:38 Copied rows OK.
20 2018-05-23T22:19:38 Swapping tables...
21 2018-05-23T22:19:38 Swapped original and new tables OK.
22 2018-05-23T22:19:38 Dropping old table...
23 2018-05-23T22:19:38 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
24 2018-05-23T22:19:38 Dropping triggers...
25 2018-05-23T22:19:38 Dropped triggers OK.
26 Successfully altered `zhangtest01`.`zhang_test`.
1 ##### 注意:确保字段中数据的唯一性,不然会丢失数据
2 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --nocheck-unique-key-change --charset=UTF8 --max-load="Threads_running=1000" --alter "ADD UNIQUE uniq_index_name(name)" D=zhangtest01,t=zhang_test --execute # ADD UNIQUE uniqueName(columnName)
3 No slaves found. See --recursion-method if host zhang has slaves.
4 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
5 Operation, tries, wait:
6 analyze_table, 10, 1
7 copy_rows, 10, 0.25
8 create_triggers, 10, 1
9 drop_triggers, 10, 1
10 swap_tables, 10, 1
11 update_foreign_keys, 10, 1
12 Altering `zhangtest01`.`zhang_test`...
13 Creating new table...
14 Created new table zhangtest01._zhang_test_new OK.
15 Altering new table...
16 Altered `zhangtest01`.`_zhang_test_new` OK.
17 2018-05-23T22:24:31 Creating triggers...
18 2018-05-23T22:24:31 Created triggers OK.
19 2018-05-23T22:24:31 Copying approximately 2005445 rows...
20 Copying `zhangtest01`.`zhang_test`: 69% 00:13 remain
21 2018-05-23T22:24:44 Copied rows OK.
22 2018-05-23T22:24:44 Swapping tables...
23 2018-05-23T22:24:44 Swapped original and new tables OK.
24 2018-05-23T22:24:44 Dropping old table...
25 2018-05-23T22:24:44 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
26 2018-05-23T22:24:44 Dropping triggers...
27 2018-05-23T22:24:44 Dropped triggers OK.
28 Successfully altered `zhangtest01`.`zhang_test`.
CREATE TABLE `zhang_test` (
`id` int(10) NOT NULL,
`uuid` int(11) DEFAULT NULL,
`name` varchar(50) NOT NULL,
`address` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `uniq_index_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--nocheck-unique-key-change
添加该参数选项,才可以添加唯一索引
1 ##### 与删除普通索引一样
2 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --charset=UTF8 --max-load="Threads_running=1000" --alter "DROP INDEX uniq_index_name" D=zhangtest01,t=zhang_test --execute # DROP UNIQUE uniqueName
3 No slaves found. See --recursion-method if host zhang has slaves.
4 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
5 Operation, tries, wait:
6 analyze_table, 10, 1
7 copy_rows, 10, 0.25
8 create_triggers, 10, 1
9 drop_triggers, 10, 1
10 swap_tables, 10, 1
11 update_foreign_keys, 10, 1
12 Altering `zhangtest01`.`zhang_test`...
13 Creating new table...
14 Created new table zhangtest01._zhang_test_new OK.
15 Altering new table...
16 Altered `zhangtest01`.`_zhang_test_new` OK.
17 2018-05-23T22:35:12 Creating triggers...
18 2018-05-23T22:35:12 Created triggers OK.
19 2018-05-23T22:35:12 Copying approximately 2005445 rows...
20 2018-05-23T22:35:19 Copied rows OK.
21 2018-05-23T22:35:19 Swapping tables...
22 2018-05-23T22:35:19 Swapped original and new tables OK.
23 2018-05-23T22:35:19 Dropping old table...
24 2018-05-23T22:35:19 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
25 2018-05-23T22:35:19 Dropping triggers...
26 2018-05-23T22:35:19 Dropped triggers OK.
27 Successfully altered `zhangtest01`.`zhang_test`.
对主键修改的步骤:
1、保证有一个唯一索引【如果没有那么就添加一个唯一索引】
2、删除原主键
3、添加新主键
4、删除之前的唯一索引【可选】
原因如下:
The new table `zhangtest01`.`_zhang_test_new` does not have a PRIMARY KEY or a unique index which is required for the DELETE trigger.
1 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --nocheck-alter --charset=UTF8 --max-load="Threads_running=1000" --alter "DROP PRIMARY KEY" D=zhangtest01,t=zhang_test --execute
2 No slaves found. See --recursion-method if host zhang has slaves.
3 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
4 Operation, tries, wait:
5 analyze_table, 10, 1
6 copy_rows, 10, 0.25
7 create_triggers, 10, 1
8 drop_triggers, 10, 1
9 swap_tables, 10, 1
10 update_foreign_keys, 10, 1
11 Altering `zhangtest01`.`zhang_test`...
12 Creating new table...
13 Created new table zhangtest01._zhang_test_new OK.
14 Altering new table...
15 Altered `zhangtest01`.`_zhang_test_new` OK.
16 2018-05-23T22:45:28 Creating triggers...
17 2018-05-23T22:45:28 Created triggers OK.
18 2018-05-23T22:45:28 Copying approximately 2005445 rows...
19 2018-05-23T22:45:42 Copied rows OK.
20 2018-05-23T22:45:42 Swapping tables...
21 2018-05-23T22:45:42 Swapped original and new tables OK.
22 2018-05-23T22:45:42 Dropping old table...
23 2018-05-23T22:45:42 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
24 2018-05-23T22:45:42 Dropping triggers...
25 2018-05-23T22:45:42 Dropped triggers OK.
26 Successfully altered `zhangtest01`.`zhang_test`.
CREATE TABLE `zhang_test` (
`id` int(10) NOT NULL,
`uuid` int(11) DEFAULT NULL,
`name` varchar(50) NOT NULL,
`address` varchar(255) DEFAULT NULL,
UNIQUE KEY `uniq_index_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
--[no]check-alter
解析-ALTER指定并尝试警告可能的意外行为(默认为“是”)
如果没有改选项,修改会失败
1 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --nocheck-alter --charset=UTF8 --max-load="Threads_running=1000" --alter "ADD PRIMARY KEY (id)" D=zhangtest01,t=zhang_test --execute
2 No slaves found. See --recursion-method if host zhang has slaves.
3 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
4 Operation, tries, wait:
5 analyze_table, 10, 1
6 copy_rows, 10, 0.25
7 create_triggers, 10, 1
8 drop_triggers, 10, 1
9 swap_tables, 10, 1
10 update_foreign_keys, 10, 1
11 Altering `zhangtest01`.`zhang_test`...
12 Creating new table...
13 Created new table zhangtest01._zhang_test_new OK.
14 Altering new table...
15 Altered `zhangtest01`.`_zhang_test_new` OK.
16 2018-05-23T22:47:23 Creating triggers...
17 2018-05-23T22:47:23 Created triggers OK.
18 2018-05-23T22:47:23 Copying approximately 2227360 rows...
19 2018-05-23T22:47:36 Copied rows OK.
20 2018-05-23T22:47:36 Swapping tables...
21 2018-05-23T22:47:36 Swapped original and new tables OK.
22 2018-05-23T22:47:36 Dropping old table...
23 2018-05-23T22:47:36 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
24 2018-05-23T22:47:36 Dropping triggers...
25 2018-05-23T22:47:36 Dropped triggers OK.
26 Successfully altered `zhangtest01`.`zhang_test`.
CREATE TABLE `zhang_test` (
`id` int(10) NOT NULL,
`uuid` int(11) DEFAULT NULL,
`name` varchar(50) NOT NULL,
`address` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `uniq_index_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
1 [root@docker01 ~]# pt-online-schema-change -h172.16.1.14 -uzhang06 -pzhang06 --nocheck-replication-filters --charset=UTF8 --max-load="Threads_running=1000" --alter "add last_name varchar(20) NOT NULL DEFAULT '' COMMENT '姓名' after name, ADD INDEX index_address(address), add birthday date COMMENT '生日'" D=zhangtest01,t=zhang_test --execute
2 No slaves found. See --recursion-method if host zhang has slaves.
3 Not checking slave lag because no slaves were found and --check-slave-lag was not specified.
4 Operation, tries, wait:
5 analyze_table, 10, 1
6 copy_rows, 10, 0.25
7 create_triggers, 10, 1
8 drop_triggers, 10, 1
9 swap_tables, 10, 1
10 update_foreign_keys, 10, 1
11 Altering `zhangtest01`.`zhang_test`...
12 Creating new table...
13 Created new table zhangtest01._zhang_test_new OK.
14 Altering new table...
15 Altered `zhangtest01`.`_zhang_test_new` OK.
16 2018-05-23T22:55:17 Creating triggers...
17 2018-05-23T22:55:17 Created triggers OK.
18 2018-05-23T22:55:17 Copying approximately 1990757 rows...
19 2018-05-23T22:55:39 Copied rows OK.
20 2018-05-23T22:55:39 Swapping tables...
21 2018-05-23T22:55:39 Swapped original and new tables OK.
22 2018-05-23T22:55:39 Dropping old table...
23 2018-05-23T22:55:39 Dropped old table `zhangtest01`.`__zhang_test_old` OK.
24 2018-05-23T22:55:39 Dropping triggers...
25 2018-05-23T22:55:39 Dropped triggers OK.
26 Successfully altered `zhangtest01`.`zhang_test`.
CREATE TABLE `zhang_test` (
`id` int(10) NOT NULL,
`uuid` int(11) DEFAULT NULL,
`name` varchar(50) NOT NULL,
`address` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `uniq_index_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `zhang_test` (
`id` int(10) NOT NULL,
`uuid` int(11) DEFAULT NULL,
`name` varchar(50) NOT NULL,
`last_name` varchar(20) NOT NULL DEFAULT '' COMMENT '姓名',
`address` varchar(255) DEFAULT NULL,
`birthday` date DEFAULT NULL COMMENT '生日',
PRIMARY KEY (`id`),
UNIQUE KEY `uniq_index_name` (`name`),
KEY `index_address` (`address`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;