fixes #3988

Closes #3988

Merge request !2852

docker-compose-dev.yml

@@ -5,7 +5,7 @@ services:
     image: mariadb:10.4
     volumes:
       - db_data:/var/lib/mysql
-    command: mysqld --sql_mode=""
+      - ./docker/studip/my.cnf:/etc/mysql/conf.d/my.cnf:ro
     restart: always
     environment:
       MYSQL_RANDOM_ROOT_PASSWORD: 1

docker-compose.yml

@@ -4,7 +4,7 @@ services:
     image: mariadb:10.4
     volumes:
       - db_data:/var/lib/mysql
-    command: mysqld --sql_mode=""
+      - ./docker/studip/my.cnf:/etc/mysql/conf.d/my.cnf:ro
     restart: always
     environment:
       MYSQL_RANDOM_ROOT_PASSWORD: 1

docker/studip/my.cnf

+[client]
+default-character-set = utf8mb4
+
+[mysql]
+default-character-set = utf8mb4
+
+[mysqld]
+init_connect='SET NAMES UTF8MB4'
+character-set-server = utf8mb4
+collation-server = utf8mb4_unicode_ci
+
+innodb_file_per_table = On
+sql_mode = NO_ENGINE_SUBSTITUTION