When retrieving type metadata from the database using getTypeInfo(), the boolean value of the UNSIGNED_ATTRIBUTE column is always true.

Sample code to reproduce the issue (with database running on localhost):

Connection con = DriverManager.getConnection("jdbc:mariadb://localhost:3306/database?user=user&password=password");

ResultSet typeInfo = con.getMetaData().getTypeInfo();

while(typeInfo.next()) {

	System.out.println(typeInfo.getString("TYPE_NAME") + ": " + typeInfo.getBoolean("UNSIGNED_ATTRIBUTE"));

}

This outputs the type names of all data types and the UNSIGNED_ATTRIBUTE being true for all of them, regardless of them having the UNSIGNED attribute or not.