Turn on/off query based on a url parameter

[Roopa Rao]

Hi,

I want to enable or disable a SolrFeature in LTR based on efi parameter.

In simple the query should be executed only if a parameter is true.

Any examples or suggestion on how to accomplish this?

Functions queries examples are are using fields to give a value to. In my
case I want to execute the query only if a url parameter is true

Thanks,
Roopa