[GitHub] [druid] gianm commented on issue #13204: Incorrect result format for queries with single value filters and GROUPING SET on the same dimension

[GitBox <gi...@apache.org>]

gianm commented on issue #13204:
URL: https://github.com/apache/druid/issues/13204#issuecomment-1274059939

   Hmm. I'm not sure if the dummy-dim-dropping code is the problem. It's only dropping dummy dims: ones that don't appear at all in the output. But `countryName` _should_ appear, because it isn't always the same (due to the GROUPING SETS).
   
   I feel like whatever replaced `countryName` with a constant `'Indonesia'` in the post-grouping projection is the thing that got it wrong. What did that? Once this happened, then the dummy-dim-dropping code dropped it, which is totally reasonable.


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