docs: public void getSQLFromField(PreparedStatement statement, int iType, int iParamColumn) throws SQLException
      {
          if (this.isNull())
          {
              if ((this.isNullable()) && (iType != DBConstants.SQL_SELECT_TYPE))
                  statement.setNull(iParamColumn, Types.DOUBLE);
              else
                  statement.setDouble(iParamColumn, Double.NaN);
          }
          else
              statement.setDouble(iParamColumn, this.getValue());
      }