code: @Override
      protected void prepare(final AbstractSQLInsertUpdate<?> _insertUpdate,
                             final Attribute _attribute,
                             final Object... _values)
          throws SQLException
      {
          checkSQLColumnSize(_attribute, 2);
          final StringWithUoM value = eval(_values);
          _insertUpdate.column(_attribute.getSqlColNames().get(0), value.getValue());
          _insertUpdate.column(_attribute.getSqlColNames().get(1), value.getUoM().getId());
      }
docs: {@inheritDoc}