MySQL - Восстанавливаем системные таблицы

Бывает, что после физического переноса MySQL базыданных - движоп перестаёт обновляться. Это вызвано ошибками в InnoDB файлах системы. Поэтому, в попытке обновления мы можем увидеть предупреждения о несуществующих таблица (даже если они физически присутствуют в папке и отображаются в SQL-менеджере):

Для того, что бы нам исправить эти ошибки - нам нужно удалить старые таблицы и создать новые.

1) Подключаемся кMySQL движку через консоль:

mysql -u admin -p -h localhost

2) Выбираем системную БД:

use mysql;

3) Удаляем таблицу через SQL-менеджер (нужно для регистрации удаления в системных файлах движка) или через консоль:

DROP TABLE <название таблицы>;

4) В папке с системными файлами /var/lib/mysql удаляем остатки от <название таблицы> с разрешениями <название таблицы>.ibd и .frm. Например:

sudo rm /var/lib/mysql/servers.ibd
sudo rm /var/lib/mysql/servers.frm

5) Создаём новые таблицы через консоль mysql. Ниже приведены SQL запросы для восстановления таблиц.

mysql.servers

CREATE TABLE `servers` (
`Server_name` char(64) NOT NULL,
`Host` char(64) NOT NULL,
`Db` char(64) NOT NULL,
`Username` char(64) NOT NULL,
`Password` char(64) NOT NULL,
`Port` int(4) DEFAULT NULL,
`Socket` char(64) DEFAULT NULL,
`Wrapper` char(64) NOT NULL,
`Owner` char(64) NOT NULL,
PRIMARY KEY (`Server_name`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8     
COMMENT='MySQL Foreign Servers table';

mysql.innodb_index_stats

CREATE TABLE `innodb_index_stats` (
`database_name` varchar(64) COLLATE utf8_bin NOT NULL,
`table_name` varchar(64) COLLATE utf8_bin NOT NULL,
`index_name` varchar(64) COLLATE utf8_bin NOT NULL,
`last_update` timestamp NOT NULL DEFAULT 
CURRENT_TIMESTAMP ON UPDATE 
CURRENT_TIMESTAMP,
`stat_name` varchar(64) COLLATE utf8_bin NOT NULL,
`stat_value` bigint(20) unsigned NOT NULL,
`sample_size` bigint(20) unsigned DEFAULT NULL,
`stat_description` varchar(1024) COLLATE utf8_bin NOT NULL,
PRIMARY KEY (`database_name`,`table_name`,`index_name`,`stat_name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 
COLLATE=utf8_bin STATS_PERSISTENT=0;

mysql.innodb_table_stats

CREATE TABLE `innodb_table_stats` (
`database_name` varchar(64) COLLATE utf8_bin NOT NULL,
`table_name` varchar(64) COLLATE utf8_bin NOT NULL,
`last_update` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`n_rows` bigint(20) unsigned NOT NULL,
`clustered_index_size` bigint(20) unsigned NOT NULL,
`sum_of_other_index_sizes` bigint(20) unsigned NOT NULL,
PRIMARY KEY (`database_name`,`table_name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0;

mysql.slave_master_info

CREATE TABLE `slave_master_info` (
`Number_of_lines` int(10) unsigned NOT NULL COMMENT 'Number of lines in the file.',
`Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log currently being read from the master.',
`Master_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last read event.',
`Host` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '' COMMENT 'The host name of the master.',
`User_name` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The user name used to connect to the master.',
`User_password` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The password used to connect to the master.',
`Port` int(10) unsigned NOT NULL COMMENT 'The network port used to connect to the master.',
`Connect_retry` int(10) unsigned NOT NULL COMMENT 'The period (in seconds) that the slave will wait before trying to reconnect to the master.',
`Enabled_ssl` tinyint(1) NOT NULL COMMENT 'Indicates whether the server supports SSL connections.',
`Ssl_ca` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Authority (CA) certificate.',
`Ssl_capath` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path to the Certificate Authority (CA) certificates.',
`Ssl_cert` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL certificate file.',
`Ssl_cipher` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the cipher in use for the SSL connection.',
`Ssl_key` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL key file.',
`Ssl_verify_server_cert` tinyint(1) NOT NULL COMMENT 'Whether to verify the server certificate.',
`Heartbeat` float NOT NULL,
`Bind` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'Displays which interface is employed when connecting to the MySQL server',
`Ignored_server_ids` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The number of server IDs to be ignored, followed by the actual server IDs',
`Uuid` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The master server uuid.',
`Retry_count` bigint(20) unsigned NOT NULL COMMENT 'Number of reconnect attempts, to the master, before giving up.',
`Ssl_crl` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Revocation List (CRL)',
`Ssl_crlpath` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path used for Certificate Revocation List (CRL) files',
`Enabled_auto_position` tinyint(1) NOT NULL COMMENT 'Indicates whether GTIDs will be used to retrieve events from the master.',
PRIMARY KEY (`Host`,`Port`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Master Information';

mysql.slave_relay_log_info

CREATE TABLE `slave_relay_log_info` (
`Number_of_lines` int(10) unsigned NOT NULL COMMENT 'Number of lines in the file or rows in the table. Used to version table definitions.',
`Relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the current relay log file.',
`Relay_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The relay log position of the last executed event.',
`Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log file from which the events in the relay log file were read.',
`Master_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last executed event.',
`Sql_delay` int(11) NOT NULL COMMENT 'The number of seconds that the slave must lag behind the master.',
`Number_of_workers` int(10) unsigned NOT NULL,
`Id` int(10) unsigned NOT NULL COMMENT 'Internal Id that uniquely identifies this record.',
PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Relay Log Information';

mysql.slave_worker_info

CREATE TABLE `slave_worker_info` (
`Id` int(10) unsigned NOT NULL,
`Relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
`Relay_log_pos` bigint(20) unsigned NOT NULL,
`Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
`Master_log_pos` bigint(20) unsigned NOT NULL,
`Checkpoint_relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
`Checkpoint_relay_log_pos` bigint(20) unsigned NOT NULL,
`Checkpoint_master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
`Checkpoint_master_log_pos` bigint(20) unsigned NOT NULL,
`Checkpoint_seqno` int(10) unsigned NOT NULL,
`Checkpoint_group_size` int(10) unsigned NOT NULL,
`Checkpoint_group_bitmap` blob NOT NULL,
PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Worker Information';

mysql.help_topic

CREATE TABLE `help_topic` (
`help_topic_id` int(10) unsigned NOT NULL,
`name` char(64) CHARACTER SET utf8 COLLATE utf8_bin UNIQUE NULL,
`help_category_id` smallint(5) unsigned NULL,
`description` text CHARACTER SET utf8 COLLATE utf8_bin NULL,
`example` text CHARACTER SET utf8 COLLATE utf8_bin NULL,
`url` char(128) CHARACTER SET utf8 COLLATE utf8_bin NULL,
PRIMARY KEY (`help_topic_id`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Installation HELP command table';

mysql.help_keyword

CREATE TABLE `help_keyword` (
`help_keyword_id` int(10) unsigned NOT NULL,
`name` char(64) CHARACTER SET utf8 COLLATE utf8_bin UNIQUE NULL,
PRIMARY KEY (`help_keyword_id`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Installation HELP command table';

mysql.help_relation

CREATE TABLE `help_relation` (
`help_topic_id` int(10) unsigned NOT NULL,
`help_keyword_id` int(10) unsigned NOT NULL,
PRIMARY KEY (`help_topic_id`, `help_keyword_id`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Installation HELP command table';

mysql.help_category

CREATE TABLE `help_category` (
`help_category_id` smallint(5) unsigned NOT NULL,
`name` char(64) CHARACTER SET utf8 COLLATE utf8_bin UNIQUE NULL,
`parent_category_id` smallint(5) unsigned NULL,
`url` char(128) CHARACTER SET utf8 COLLATE utf8_bin NULL,
PRIMARY KEY (`help_category_id`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Installation HELP command table';

mysql.time_zone_name

CREATE TABLE `time_zone_name` (
`Name` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
`Time_zone_id` int(10) unsigned NOT NULL,
PRIMARY KEY (`Name`, `Time_zone_id`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Contain time zone information';

mysql.time_zone

CREATE TABLE `time_zone` (
`Time_zone_id` int(10) unsigned NOT NULL,
`Use_leap_seconds`enum('Y','N') CHARACTER SET utf8 COLLATE utf8_bin DEFAULT 'N',
PRIMARY KEY (`Time_zone_id`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Contain time zone information';

mysql.time_zone_leap_second

CREATE TABLE `time_zone_leap_second` (
`Transition_time` bigint(20) unsigned NOT NULL,
`Correction` int(11) unsigned NOT NULL,
PRIMARY KEY (`Transition_time`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Contain time zone information';

mysql.time_zone_transition

CREATE TABLE `time_zone_transition` (
`Time_zone_id` int(10) unsigned NOT NULL,
`Transition_time` bigint(20) unsigned NOT NULL,
`Transition_type_id` int(10) unsigned NOT NULL,
PRIMARY KEY (`Time_zone_id`, `Transition_time`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Contain time zone information';

mysql.time_zone_transition_type

CREATE TABLE `time_zone_transition_type` (
`Time_zone_id` int(10) unsigned NOT NULL,
`Transition_type_id` int(10) unsigned NOT NULL,
`Offset` int(11) DEFAULT '0' NOT NULL,
`Is_DST` tinyint(3) unsigned DEFAULT '0' NOT NULL,
`Abbreviation` char(8) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
PRIMARY KEY (`Time_zone_id`, `Transition_type_id`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Contain time zone information';

mysql.gtid_executed

CREATE TABLE gtid_executed (
`source_uuid` CHAR(36) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
`interval_start` BIGINT(20) NOT NULL,
`interval_end` BIGINT(20) NOT NULL,
PRIMARY KEY (`source_uuid`, `interval_start`)
) ENGINE=`InnoDB` DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='GTIDs stores here';

scripts/mysql_system_tables.sql:

mysql.server_cost

CREATE TABLE IF NOT EXISTS server_cost (
  cost_name   VARCHAR(64) NOT NULL,
  cost_value  FLOAT DEFAULT NULL,
  last_update TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  comment     VARCHAR(1024) DEFAULT NULL,
  default_value FLOAT GENERATED ALWAYS AS
    (CASE cost_name
       WHEN 'disk_temptable_create_cost' THEN 20.0
       WHEN 'disk_temptable_row_cost' THEN 0.5
       WHEN 'key_compare_cost' THEN 0.05
       WHEN 'memory_temptable_create_cost' THEN 1.0
       WHEN 'memory_temptable_row_cost' THEN 0.1
       WHEN 'row_evaluate_cost' THEN 0.1
       ELSE NULL
     END) VIRTUAL,
  PRIMARY KEY (cost_name)
) ENGINE=InnoDB CHARACTER SET=utf8 COLLATE=utf8_general_ci STATS_PERSISTENT=0;

mysql.engine_cost

CREATE TABLE IF NOT EXISTS engine_cost (
  engine_name VARCHAR(64) NOT NULL,
  device_type INTEGER NOT NULL,
  cost_name   VARCHAR(64) NOT NULL,
  cost_value  FLOAT DEFAULT NULL,
  last_update TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  comment     VARCHAR(1024) DEFAULT NULL,
  default_value FLOAT GENERATED ALWAYS AS
    (CASE cost_name
       WHEN 'io_block_read_cost' THEN 1.0
       WHEN 'memory_block_read_cost' THEN 0.25
       ELSE NULL
     END) VIRTUAL,
  PRIMARY KEY (cost_name, engine_name, device_type)
) ENGINE=InnoDB CHARACTER SET=utf8 COLLATE=utf8_general_ci STATS_PERSISTENT=0;

6) Перезагружаем MySQL:

sudo /etc/init.d/mysql start

PS: Подробнее о таблицах можно узнать на сайте MySQL и MariaDB: https://mariadb.com/kb/en/library/the-mysql-database-tables/

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