Loading CSV with a column containing null values results in dropped column

Hi there,

I am loading a csv file that has a column that at the moment contains all null values. This column gets dropped.

But I know that the future data will contain values and my subsequent processing is expecting this column to be present and thus fails.

I had tried to add a dimension manually and use transform but still it in all cases resulted into the column to be dropped.

Any idea, how to force Druid to create the column eve the values are all null?

Thanks in advance!