could configure-generators --spec=csv default to dist_gen.constant when no source data #57
Description
We have set consistent options for omop generators in a csv, but when there a field has no data we get an error that a generator is not appropriate.
Instead could it default to dist_gen.constant ?
For date columns when the source contains no data, currently we have to delete that row because no options are offered. (presumably because there is no null option for date). It would be good to solve that too but I can submit as separate issue.
e.g.
condition_occurrence,condition_start_date,generic.datetime.date