proc dbOpen(_: type MySQL; database: string; user: string; password: string;
            host: string; port: int; maxConnections: int = 1; timeout = 30;
            shouldDisplayLog = false; shouldOutputLogFile = false; logDir = ""): MysqlConnections

proc dbOpen(_: type MySQL; databaseUrl: DatabaseUrl; maxConnections = 1;
            timeout = 30; shouldDisplayLog = false; shouldOutputLogFile = false;
            logDir = ""): MysqlConnections

proc dbOpen(_: type MySQL; url: string; maxConnections = 1; timeout = 30;
            shouldDisplayLog = false; shouldOutputLogFile = false; logDir = ""): MysqlConnections