Yeah for now we limited our work to the queries built by the DSL. We expect people not using the DSL to build native queries instead.

As for BoostQuery, I remember vaguely it was not so simple either to replace our usage of setBoost or to interpret it correctly in the translator but I don't remember the specifics.

See this issue I created a while ago which is related to that: https://hibernate.atlassian.net/browse/HSEARCH-2137 .

FWIW, we can't do anything for a lot of Lucene queries. See the issue I opened here at Lucene: https://issues.apache.org/jira/browse/LUCENE-7058 . My patch got committed in Lucene 6 so we might revisit that later.