yuguang commented on issue #6986: BUG: Time series Line chart has broken URL: https://github.com/apache/incubator-superset/issues/6986#issuecomment-476437544 @villebro I tried out 0.31 RC It still has the same `__timestamp` bug when using Snowflake with Time-series bar charts. This is the detailed error report: ``` Traceback (most recent call last): File "/home/superset/superset/views/base.py", line 114, in wraps return f(self, *args, **kwargs) File "/home/superset/superset/views/core.py", line 1229, in explore_json samples=samples, File "/home/superset/superset/views/core.py", line 1160, in generate_json payload = viz_obj.get_payload() File "/home/superset/superset/viz.py", line 375, in get_payload payload['data'] = self.get_data(df) File "/home/superset/superset/viz.py", line 1223, in get_data df = self.process_data(df) File "/home/superset/superset/viz.py", line 1143, in process_data values=self.metric_labels) File "/usr/local/lib/python3.6/site-packages/pandas/core/frame.py", line 5303, in pivot_table margins_name=margins_name) File "/usr/local/lib/python3.6/site-packages/pandas/core/reshape/pivot.py", line 86, in pivot_table grouped = data.groupby(keys, observed=False) File "/usr/local/lib/python3.6/site-packages/pandas/core/generic.py", line 6665, in groupby observed=observed, **kwargs) File "/usr/local/lib/python3.6/site-packages/pandas/core/groupby/groupby.py", line 2152, in groupby return klass(obj, by, **kwds) File "/usr/local/lib/python3.6/site-packages/pandas/core/groupby/groupby.py", line 599, in __init__ mutated=self.mutated) File "/usr/local/lib/python3.6/site-packages/pandas/core/groupby/groupby.py", line 3291, in _get_grouper raise KeyError(gpr) KeyError: '__timestamp' ```
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