bkowshik opened a new issue #18726:
URL: https://github.com/apache/superset/issues/18726
## Reproduce bug
I am running a simple `GROUP BY` query like the one below and then do a
Sunburst visualization.
```sql
SELECT
DATE_PARSE(yyyymmdd, '%Y%m%d') yyyymmdd,
city_name,
COUNT(*) gross_orders
FROM orders
WHERE
yyyymmdd = '20211012'
GROUP BY 1, 2
ORDER BY 3 DESC
```
## Expected results
I am expecting to see the visualization.
## Actual results
I am seeing the error below.
> An error occurred while rendering the visualization: TypeError: Cannot
read properties of null (reading 'toString')
<img width="1680" alt="Screenshot 2022-02-15 at 6 47 28 AM"
src="https://user-images.githubusercontent.com/2899501/153974945-b4bc4e17-d13f-4a93-8a95-adc0a0044039.png";>
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![https://user-images.githubusercontent.com/2899501/153974945-b4bc4e17-d13f-4a93-8a95-adc0a0044039.png"](https://user-images.githubusercontent.com/2899501/153974945-b4bc4e17-d13f-4a93-8a95-adc0a0044039.png"){kind=link}