mariadbの文字コードをutf8mb4にする


修正前

MariaDB [stock]> SHOW VARIABLES LIKE 'character_set%';
+--------------------------+------------------------------+
| Variable_name            | Value                        |
+--------------------------+------------------------------+
| character_set_client     | utf8                         |
| character_set_connection | utf8                         |
| character_set_database   | utf8mb4                      |
| character_set_filesystem | binary                       |
| character_set_results    | utf8                         |
| character_set_server     | latin1 ★                     |
| character_set_system     | utf8                         |
| character_sets_dir       | /usr/share/mariadb/charsets/ |
+--------------------------+------------------------------+
8 rows in set (0.003 sec)
MariaDB [stock]> SHOW VARIABLES LIKE 'collation%';
+----------------------+--------------------+
| Variable_name        | Value              |
+----------------------+--------------------+
| collation_connection | utf8_general_ci    |
| collation_database   | utf8mb4_general_ci |
| collation_server     | latin1_swedish_ci ★|
+----------------------+--------------------+
3 rows in set (0.001 sec)

サーバ側 修正

vi /etc/my.cnf.d/mariadb-server.cnf

[mysqld]
character-set-server=utf8mb4

クライアント側 修正

vi /etc/my.cnf.d/client.cnf

[client]
default-character-set=utf8mb4

再起動

systemctl restart mariadb

修正後

MariaDB [stock]> SHOW VARIABLES LIKE 'character_set%';
+--------------------------+------------------------------+
| Variable_name            | Value                        |
+--------------------------+------------------------------+
| character_set_client     | utf8mb4                      |
| character_set_connection | utf8mb4                      |
| character_set_database   | utf8mb4                      |
| character_set_filesystem | binary                       |
| character_set_results    | utf8mb4                      |
| character_set_server     | utf8mb4 ★                    |
| character_set_system     | utf8                         |
| character_sets_dir       | /usr/share/mariadb/charsets/ |
+--------------------------+------------------------------+
8 rows in set (0.001 sec)
+----------------------+--------------------+
| Variable_name        | Value              |
+----------------------+--------------------+
| collation_connection | utf8mb4_general_ci |
| collation_database   | utf8mb4_general_ci |
| collation_server     | utf8mb4_general_ci |
+----------------------+--------------------+
3 rows in set (0.001 sec)