Applying `GROUP BY` on `Time-series (Bar) Chart` Omits NULL group values

A clear and concise description of what the bug is.

Expected results

Total counts of stacked bar chart should be the same before/after GROUP BY has been introduced.

Actual results

Total counts of stacked bar chart with GROUP BY applied are wonky and don’t match those without GROUP BY applied. It seems likely that this only occurs when using a GROUP BY on a column where the column’s value could be NULL.

Steps to recreate:

1. Query:

SELECT 'group1' as test, 10 AS count, CURRENT_DATE() AS date
UNION ALL
SELECT NULL as test, 5 AS count, CURRENT_DATE() AS date
UNION ALL
SELECT 'group3' as test, 5 AS count, CURRENT_DATE() AS date
UNION ALL
SELECT 'group4' as test, 5 AS count, CURRENT_DATE() AS date

1. Create Time Series Stacked Bar Chart (ECharts) without GROUP BY

2. Compare with GROUP BY and observe some other weird behavior here where the two stacked colors exclude the 3rd non-null group…

Other Screenshots

Without:

With GROUP BY:

Environment

Not sure. Using Preset.io latest

Checklist

Make sure to follow these steps before submitting your issue - thank you!

• I have checked the superset logs for python stacktraces and included it here as text if there are 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. - Maybe this one is similar? https://github.com/apache/superset/issues/13850

[andrewscarani]

@junlincc 100% agree to show NULLs. They are a valid category group and without them, data becomes skewed. I would prefer if the new ECharts behaved in the same manner as the existing Bar Charts.

[andrewscarani]

It appears that this may have already been fixed?