For UUID column, the type name in metadata should not be CHAR

Consider the following code:

SQL

create table uuid_test (id uuid);

Java

var rs = stmt.executeQuery("select * from uuid_test");

var md = rs.getMetaData();

var s = md.getColumnTypeName(1) + ", " + md.getColumnType(1) + ", " + md.getColumnClassName(1);

For MariaDB, the result of s is "CHAR, 1, java.lang.String".
For PostgreSQL, the result of s is "uuid, 1111, java.util.UUID".

The latter is more reasonable. For the former, we does not know it's a UUID column or a CHAR column with size = 36.