kokhlo commented on PR #43682:
URL: https://github.com/apache/superset/pull/43682#issuecomment-5470986527

   Please go ahead — the gap is yours.
   
   One pointer from digging into it while reviewing this PR: `pivot_table` has 
no index-side dropna flag, so the usual approach is filling NULL index keys 
before the pivot (the way `_restore_dropped_metric_columns` already handles 
NULL preservation structurally), and the regression test should assert the NULL 
group survives the full aggregate → pivot chain, not just aggregate alone. 
Happy to review when the PR is up.


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