@Override
    public Statement createStatement() throws SQLException {
        checkOpen();
        return createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY, ResultSet.CLOSE_CURSORS_AT_COMMIT);
    }
Returns configuration for current connection. Changes made to the instance of configuration may have side effects.
Application should avoid making changes to this object until it is documented.
@return - reference to internal instance of JdbcConfiguration
jdbc-v2/src/main/java/com/clickhouse/jdbc/ConnectionImpl.java