information schema does not show default charset from CREATE DATABASE

[gregwebs]

Bug Report

1. What did you do?

mysql> CREATE DATABASE `foo` DEFAULT CHARACTER SET = 'utf8mb4';
Query OK, 0 rows affected (0.01 sec)

mysql> SELECT default_character_set_name FROM information_schema.SCHEMATA  WHERE schema_name = 'foo';
+----------------------------+
| default_character_set_name |
+----------------------------+
| utf8                       |
+----------------------------+
1 row in set (0.00 sec)
mysql> show create database foo
    -> ;
+----------+------------------------------------------------------------------+
| Database | Create Database                                                  |
+----------+------------------------------------------------------------------+
| foo      | CREATE DATABASE `foo` /* !40100 DEFAULT CHARACTER SET utf8mb4 */ |
+----------+------------------------------------------------------------------+
1 row in set (0.00 sec)

2. What did you expect to see?
   utf8mb4

3. What did you see instead?
   utf8

4. What version of TiDB are you using (tidb-server -V or run select tidb_version(); on TiDB)?
   v2.1.0-rc.2