Druid left out a dimension column with all NULL values

In the process of ingesting a kafka topic, Druid left out a dimension column(String type) with NULL values for all rows. Is it a default behaviour ?

How should i include the column in such a scenario ?

Also, what if i want to include a place holder value for column of such type ?

Druid Version: 0.21.1


Does this help?

Thanks, The documentation was really helpful

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