The query team maintains query_knob_configuration.h which holds a large number of accessors for server parameters. The purpose of this class is to ensure safe access of parameters, it is initialized once at the beginning of a query, so the value of a parameter may be accessed multiple times and guaranteed not to change over the lifetime of a query.

This file itself is structured in a rigid fashion, all the knobs have the same initialization, getters, setters, etc. This ticket suggests adding a feature to IDL to  allow server parameters to be marked as "query-stable" and generate the QueryKnobConfiguration class. This will reduce toil of query team adding new parameters to this class.