Returns character set name string for current database.
Syntax:
function GetDatabaseCharacterset(): String;
Description:
GetDatabaseCharacterset() method returns character set name as it have been reported by server.
For example: cp1251.
This method returns 'character_set' server variable's value for MySQL earlier than 4.1.1 and 'character_set_database' server variable's value for MySQL greater than 4.1.1