vylc opened a new issue #4347: [Druid] Explore view throws error when group by is applied URL: https://github.com/apache/incubator-superset/issues/4347 Chart: Line/Time series Datasource: Druid Unsure what is going on--cryptic error is thrown when I try visualizing the dataset as a line chart with a group by on a single dimension. Works fine on the non-Druid datasource <img width="1468" alt="screen shot 2018-02-05 at 9 58 56 pm" src="https://user-images.githubusercontent.com/33429480/35843994-fa257098-0abf-11e8-8a69-0ca802410100.png";> Make sure these boxes are checked before submitting your issue - thank you! - [ ] I have checked the superset logs for python stacktraces and included it here as text if any - [ ] I have reproduced the issue with at least the latest released version of superset - [ ] I have checked the issue tracker for the same issue and I haven't found one similar ### Superset version ### Expected results ### Actual results ### Steps to reproduce
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