MySQL 8.0.0でmysqlスキーマの中身がほぼ全部InnoDBになった

MySQL 8.0でmysqlスキーマの中身が全部InnoDBになった。


5.7だと↓だったのが、

mysql57> SELECT table_name, engine FROM information_schema.tables WHERE table_schema = 'mysql' ORDER BY table_name;
+---------------------------+--------+
| table_name                | engine |
+---------------------------+--------+
| columns_priv              | MyISAM |
| db                        | MyISAM |
| engine_cost               | InnoDB |
| event                     | MyISAM |
| func                      | MyISAM |
| general_log               | CSV    |
| gtid_executed             | InnoDB |
| help_category             | InnoDB |
| help_keyword              | InnoDB |
| help_relation             | InnoDB |
| help_topic                | InnoDB |
| innodb_index_stats        | InnoDB |
| innodb_table_stats        | InnoDB |
| ndb_binlog_index          | MyISAM |
| plugin                    | InnoDB |
| proc                      | MyISAM |
| procs_priv                | MyISAM |
| proxies_priv              | MyISAM |
| servers                   | InnoDB |
| server_cost               | InnoDB |
| slave_master_info         | InnoDB |
| slave_relay_log_info      | InnoDB |
| slave_worker_info         | InnoDB |
| slow_log                  | CSV    |
| tables_priv               | MyISAM |
| time_zone                 | InnoDB |
| time_zone_leap_second     | InnoDB |
| time_zone_name            | InnoDB |
| time_zone_transition      | InnoDB |
| time_zone_transition_type | InnoDB |
| user                      | MyISAM |
+---------------------------+--------+
31 rows in set (0.01 sec)

↓が8.0.0

mysql80> SELECT table_name, engine FROM information_schema.tables WHERE table_schema = 'mysql' ORDER BY table_name;
+---------------------------+--------+
| TABLE_NAME                | ENGINE |
+---------------------------+--------+
| column_stats              | InnoDB |
| columns_priv              | InnoDB |
| component                 | InnoDB |
| db                        | InnoDB |
| default_roles             | InnoDB |
| engine_cost               | InnoDB |
| func                      | InnoDB |
| general_log               | CSV    |
| gtid_executed             | InnoDB |
| help_category             | InnoDB |
| help_keyword              | InnoDB |
| help_relation             | InnoDB |
| help_topic                | InnoDB |
| innodb_index_stats        | InnoDB |
| innodb_table_stats        | InnoDB |
| plugin                    | InnoDB |
| procs_priv                | InnoDB |
| proxies_priv              | InnoDB |
| role_edges                | InnoDB |
| server_cost               | InnoDB |
| servers                   | InnoDB |
| slave_master_info         | InnoDB |
| slave_relay_log_info      | InnoDB |
| slave_worker_info         | InnoDB |
| slow_log                  | CSV    |
| tables_priv               | InnoDB |
| time_zone                 | InnoDB |
| time_zone_leap_second     | InnoDB |
| time_zone_name            | InnoDB |
| time_zone_transition      | InnoDB |
| time_zone_transition_type | InnoDB |
| user                      | InnoDB |
+---------------------------+--------+
32 rows in set (0.02 sec)

general_log, slow_logは相変わらずとして、それ以外はInnoDBになった。
column_stats, component, default_roles, role_edgesが新設テーブル、ndb_binlog_index, event, procがなくなってる。ndb_binlog_indexはコンパイル方法が違うのかとも思うけど取り敢えず置いておく。


あと、mysqld --initializeした中でも、 **InnoDB: Creating foreign key constraint system tables.** って書いてあるので、おおおって感じがした。

$ bin/mysqld --no-defaults --initialize-insecure --basedir=./ --datadir=./data
2016-09-05T01:17:12.549926Z 0 [Warning] Changed limits: max_open_files: 1024 (requested 5000)
2016-09-05T01:17:12.550002Z 0 [Warning] Changed limits: table_open_cache: 431 (requested 2000)
2016-09-05T01:17:12.550282Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2016-09-05T01:17:12.842536Z 1 [Warning] InnoDB: New log files created, LSN=49311
2016-09-05T01:17:12.890633Z 1 [Warning] InnoDB: Creating foreign key constraint system tables.
2016-09-05T01:17:14.176756Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 7a644122-7306-11e6-bba7-02018582356a.
2016-09-05T01:17:14.185156Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2016-09-05T01:17:14.185650Z 3 [Warning] root@localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.