There is reasonable call for a Druid translator based on the Calcite Avatica driver.  There is some older code I've seen out that attempts.  I've written one that we are now using in Production at Rakuten and would like to submit it back as the start for the full translator.

We were using the Hive translator with the Hive Druid Storage Handler in our hadoop clusters but there some caveats to its use so we'd prefer to go native druid sql directly.

As a user I need the ability to connect to Druid through jdbc with language support compliant with https://druid.apache.org/docs/latest/querying/sql.html , Avatica 0.17 being current.