[GitHub] [druid] noskcire11 commented on issue #4349: [Proposal] Improve Handling of Nulls in Druid

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noskcire11 commented on issue #4349:
URL: https://github.com/apache/druid/issues/4349#issuecomment-683235158


   i guess proposal no 6 means to preserve column metadata on all null columns, right?
   
   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)
   
   the other case is with turnilo, which i assume only using the last segment metadata as the datasource structure when the turnilo refresh it. so if the last segment ingested contains an 'all-null' column, it resulted in an error


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