1. My MySQL server has default character set `utf8mb4` and collation `utf8mb4_unicode_ci`.
2. Database created for ORM has the same character set and collation as the server.
3. When I use command `doctrine orm:schema-tool:create` to create a schema, a table with character set `utf8` and collation `utf8_unicode_ci` is created (should be utf8mb4 and utf8mb4_unicode_ci).
4. When I use mysql client to create table, no problem at all.
I'm not sure is it intended or not, doctrine will just ignore utf8mb4 character set?