With the addition of fixed-interval bucketing in PM-2724 we can add Query optimizations for rewrites (PM-3324) when a fixed-interval granularity is used and not modified. However, we currently don't have a way to flag to Query that all buckets have the same fixed granularity since they can be changed by users via collMod to inform when rewrites are applicable/safe.

We could add a flag to the collection on creation that says "these parameters have not been modified" and just unset it if we change them.