ALTER DATABASE is used to specify or modify the default character set and collation of the current database.
ALTER SCHEMA has the same effect as
AlterDatabaseStmt ::= 'ALTER' 'DATABASE' DBName? DatabaseOptionList DatabaseOption ::= DefaultKwdOpt ( CharsetKw '='? CharsetName | 'COLLATE' '='? CollationName | 'ENCRYPTION' '='? EncryptionOpt )
Modify the test database schema to use the utf8mb4 character set:
ALTER DATABASE test DEFAULT CHARACTER SET = utf8mb4;
Query OK, 0 rows affected (0.00 sec)
Currently, TiDB only supports some character sets and collations. See Character Set and Collation Support for details.
This statement is understood to be fully compatible with MySQL. Any compatibility differences should be reported via an issue on GitHub.