bolkedebruin commented on issue #4114: Fix using undefined DruidMetrics for limit_spec URL: https://github.com/apache/incubator-superset/pull/4114#issuecomment-354942065 Ah that looks great! I?m aware of the effort to create a sql interface to Druid. That should put adoption on steroids I guess, but it will take awhile before that is deemed stable. So I think you?re right on how the issue is triggered from MapBox, due to the absence of a defined metric in the UI superset defaults to a set of pre-defined ones which 1) are not in the query and thus not known to Druid and 2) not normalize (as done at other places) to just it?s value hence being unserializable. The pr uses the dimension as per Druid spec if a metric is absent. So setting ?is_timeseries? to false probably fixes the symptom but will hide the bug.
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