We can add some restrictions that make it possible to control how many selections the user will be required to make in order to generate the details:
$(odso_start_station_name)[1-10]
In this example, it is essential that the user makes at least one selection in start_station_name and no more than ten selections.
It's important to create some limits that require the user to make some selections. Avoid the temptation to retrieve all data and break all efforts to plan how much data is loaded. If you retrieve more data that the server can load into RAM, this could lead to a system failure.