As far as I can tell, Search queries only support simple default dimensions - string names of actual dimensions. I have a use case where I’d want to use an extraction dimension spec to do a lookup.
I am still on 0.8.2 so maybe it got added in 0.9? The docs still specify a “String list of dimension” which suggests not.
If it’s not in 0.9 is it being looked at for a future version?