WIP Announce: Segment parallel query time join with sidecar index

[Mikhail Khludnev]

Hello,
FYI, working on the subj. see
https://issues.apache.org/jira/browse/SOLR-18307
The first results are rather promising
https://github.com/mkhludnev/solr/tree/aijoin-qparser

-- 
Sincerely yours
Mikhail Khludnev