In LSCS-RT, if i remove "=" from query then it is returning records:/lscs/v1/document/$?q=(TeamSite/Metadata/ContentCategories:"fyhme1rp")+AND+(TeamSite/Metadata/ContentType=fyhme1ro)&start=0&max=10&project=//domain/default/main/livesitecs/demo&format=json
I'm not familiar with the demo site, and I'm puzzled as to how the query isn't parsed the same on both sides, but that's definitely not the right syntax. Both '=' are wrong in the metadata matching. It should be using this:
If it's using an OOTB class, well, that's just plain broken. Instead of trying to fix it, you might as well just ignore this part of the demo spar and write your own if/when you need it.
I got information from support site that ":=" operator used for exact match.