Make sure these boxes are checked before submitting your issue - thank you!
- [X] I have checked the superset logs for python stacktraces and included it here as text if any - [x] I have reproduced the issue with at least the latest released version of superset - [x] I have checked the issue tracker for the same issue and I haven't found one similar ### Superset version 0.28 RC6 from 2018-09-12 ### Expected results A timeseris graph is displayed ### Actual results * `Unexepeted Error` is shown in the UI * Inspecting the asnwer from the corresponding https request, it shows a stacktrace finishing with : ```File "/home/work/incubator-superset/superset/utils.py", line 366, in datetime_to_epoch return (dttm - epoch_with_tz).total_seconds() * 1000 File "pandas/_libs/tslibs/timestamps.pyx", line 320, in pandas._libs.tslibs.timestamps._Timestamp.__sub__ TypeError: Timestamp subtraction must have the same timezones or no timezones``` ### Steps to reproduce * Create source from a table having a date column of type `TIMESTAMP WITHOUT TIME ZONE` (postgres 9.3) * Try creating a timeseries graph using it ### Workaround * According to my colleagues (I could not test), the same database allowed making TS graphs with a version of superset he installed a month ago from an "image for easyer installation he found on github" * Adding a record having value `my_date WITH TIME ZONE 'MST'`, typed `TIMESTAMP` and using it as the time for the graph worked [ Full content available at: https://github.com/apache/incubator-superset/issues/5910 ] This message was relayed via gitbox.apache.org for [email protected]
