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Posted to notifications@superset.apache.org by "propellerjet (via GitHub)" <gi...@apache.org> on 2026/06/17 13:37:23 UTC

[I] [Mixed Chart] Stacked bars incorrectly render N/A values as "0" and "1" on bar and in tooltip when categories are missing for specific time periods [superset]

propellerjet opened a new issue, #41156:
URL: https://github.com/apache/superset/issues/41156

### Bug description

In a Mixed Chart configured with Stacked Bars for both metrics, missing data points (NULLs) for specific categories in a given time period are incorrectly rendered.
Displays these missing values as 0 and 1 on the bars and erroneously reports them as 1 in the tooltip.

Steps to Reproduce:
1. Create a new Mixed Chart.
2. Configure the following settings:
X-Axis: Time column (e.g., Year).
Series/Group By: Categorical column (e.g., Quarter).
Metrics: Add two metrics (e.g., Query A and Query B).
Chart Type: Ensure both metrics are set to display as Bar and enable Stacked Bars.
Tooltip: Rich type enable
3. Prepare data with the following scenario:
Year 1: Data exists for all Quarters (Q1, Q2, Q3, Q4) for both metrics.
Year 2: Data exists only for Q1 and Q2. Q3 and Q4 are completely missing (no rows in the dataset) for both metrics.
Run the chart.
Hover over the bars for Year 2

### Screenshots/recordings

Query A

<img width="1780" height="862" alt="Image" src="https://github.com/user-attachments/assets/3b53c705-88af-4515-a25c-9af152f2de28" />
Query B

<img width="1780" height="279" alt="Image" src="https://github.com/user-attachments/assets/261f87ec-8ed8-437f-8aa3-4b4de842f81c" />
Tooltip

### Superset version

6.0.0

### Python version

3.9

### Node version

### Browser

Chrome

### Additional context

_No response_

### Checklist

- [x] I have searched Superset docs and Slack and didn't find a solution to my problem.
- [x] I have searched the GitHub issue tracker and didn't find a similar bug report.
- [ ] I have checked Superset's logs for errors and if I found a relevant Python stacktrace, I included it here as text in the "additional context" section.

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Re: [I] [Mixed Chart] Stacked bars incorrectly render N/A values as "0" and "1" on bar and in tooltip when categories are missing for specific time periods [superset]

Posted by "propellerjet (via GitHub)" <gi...@apache.org>.

propellerjet closed issue #41156: [Mixed Chart] Stacked bars incorrectly render N/A values as "0" and "1" on bar and in tooltip when categories are missing for specific time periods
URL: https://github.com/apache/superset/issues/41156


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