rusackas commented on PR #35962:
URL: https://github.com/apache/superset/pull/35962#issuecomment-5062747648

   Anthony, just checking back in here. Still curious whether there's a 
concrete repro on current `master` where columns actually get dropped for an 
empty result set. From what I traced, the per-column loop above already builds 
a zero-length array for every column name, so `pa_data` and `column_names` are 
always the same length and the new `if not pa_data and column_names` branch 
never fires. If you can't find a repro, I'd rather land just the test as a 
regression guard and drop the code hunk.


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