We have just released a new version of PlyQL that is able to provide a MySQL gateway to Druid. It basically looks like a read-only MySQL server but really it is talking to Druid. This should allow you to use your favorite ODBC / JDBC (MySQL) connector with Druid.
We would appreciate your help testing this HIGHLY EXPERIMENTAL feature.
Read more about it here: http://imply.io/post/2016/05/04/programmatic-plyql.html