<fieldset>
    <div>
        <label for="pos">{% trans "Start row:" %}</label>
        <input type="number" name="pos" min="0" required="required"
            {% if unlim_num_rows > 0 -%}
                max="{{ unlim_num_rows - 1 }}"
            {%- endif %}
            value="{{ pos }}">

        <label for="session_max_rows">{% trans "Number of rows:" %}</label>
        <input type="number" name="session_max_rows" min="1"
               value="{{ rows }}" required="required">
        <input class="btn btn-primary" type="submit" name="submit" class="Go"
               value="{% trans "Go" %}">
        <input type="hidden" name="sql_query"
               value="{{ sql_query }}">
        <input type="hidden" name="unlim_num_rows"
               value="{{ unlim_num_rows }}">
    </div>
</fieldset>