Case sensitive craft.entries.search() in Craft From Brad's answer to this question it's obvious that Craft doesn't have a case sensitive search from the start, but he mentions that it depends on MySQL database and table collation. 

My question is however related to the way Craft saves keywords in craft_searchindex table. Here they are converted to lowercase. So my question is if there is a way to enable case sensitive search through MySQL collation changes?

My issue is that the client sees an issue when searching for a Persons name in an article content he also finds results which only include words starting the same. However fuzzy search on the right side is needed, so turning it off isn't an option.
My answer in that other question was wrong (I've updated it).

As you pointed out, Craft normalizes all search keywords to be lowercase.  Case  sensitive searches would rely on the database's underlying collation if Craft didn't do that normalization first.

Probably worth adding as a feature request, if you think that shouldn't be the default behavior.