I'm using Solr 8.11.
I've noticed in one of my ReRankQueries with LTR, that on an efi, it matters if I use: efi.some_name=${queryParam} vs efi.some_name=$queryParam.
The single resource I found on the web was from a blog from 2014, calling the ${} notation, as the macro expansion one.
From what I experimented with, it seems that ${queryParam} is evaluated and the pasted there as is, for example, if queryParam="multi worded string", then efi.some_name=multi worded string, and this will require do be enclosed in ".
For the $queryParam, it seems that the query parser knows to associate the full value to efi.some_name.
What is the difference between those 2?
