uyivzola opened a new pull request, #44121: URL: https://github.com/apache/superset/pull/44121
### SUMMARY Keep NULL grouping values in histogram counts and show `<NULL>` in legends and tooltips. Missing numeric values remain excluded. Addresses the histogram portion of #43547. ### BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF Before: NULL groups disappear; an all-NULL grouping column errors.  After: all valid observations appear with visible NULL labels.  ### TESTING INSTRUCTIONS Create a histogram with mixed NULL/non-NULL groups. Check counts, legend and tooltip; repeat with all groups NULL and with two grouping columns. Passed: 146 backend tests, 10 histogram frontend tests, pre-commit (mypy and TypeScript included), frontend/docs production builds, and five live chart API cases. Browser checks used the exact changed backend module and new frontend assets in an existing ARM64 Superset image. ### ADDITIONAL INFORMATION - [x] Has associated issue: #43547 (histogram only) - [x] Changes UI - [ ] Includes DB Migration - [ ] Introduces new feature or API -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
