"Custom" dimensions in Druid datasources cause problems with some Visualization types

[lrcutra]

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• 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

0.24.0

All problems mentioned within this issue relate to Druid datasources.

Expected results

Superset should visualize the query when using user-defined dimension in Group-By clause.

Actual results

With some types of visualizations it's not possible to use custom dimensions (e.g. lookup, extractions [extractionFn of any kind]) in the Group-by clause.

Using a single custom dimension in Group-by with Visualization Type: "Distribution - Bar Chart", the result looks as follows:

Only the name of the dimension is displayed, but no visualization at all.

Adding at least one additional dimension (of any kind) solves the problem, and the visualization works.

However it remains impossible to use some types of visualizations when grouping by a single "custom" dimension.

Steps to reproduce

Add an individual dimension to your Druid datasource by specifying a custom json [e.g. lookup or extraction]. Use this dimension within the Group-By clause of your query with visualization type "Distribution-Bar chart".
Superset won't visualize but only return the name of the "custom" dimension.

[ghulands]

@lrcutra, you might want to cherry pick in this PR #4740 until it gets merged.

[stale]

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[lrcutra]

Ich bin derzeit nicht im Büro. Ich kehre zurück am 15.04.2019. Ich werde Ihre Nachricht nach meiner Rückkehr beantworten. Die Rückmeldung bezieht sich auf ein Mail mit folgendem Thema: Re: [apache/incubator-superset] "Custom" dimensions in Druid datasources cause problems with some Visualization types (#4805)

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. For admin, please label this issue .pinned to prevent stale bot from closing the issue.