bharadwajrembar commented on issue #4349:
URL: https://github.com/apache/druid/issues/4349#issuecomment-745797223


   Hey @noskcire11 How did you overcome this? All segments have null values for 
the dimension so the dimension ends up being removed in the column metadata for 
that datasource.
   ```
   in my case(1 of 2 cases): i have this column which only contain null values 
(for now). after ingesting it to druid, the column is missing (the datasource 
doesn't have that column). so my query in some app to druid using that column 
ended up as an error (no column). and when some other segment ingested with the 
column contains non null values, the datasource finally have that column (even 
though only 1 segment have that non null value)
   ```


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