Cannot convert an object of type DataValues.DataValue{Any} to an object of type DateTime

[IanButterworth]

I’m stuck with new Julia 0.7/1.0 DataFrames functionality. I have dataframe df where column 1 is an array of DataValues.DataValue{Any}.

How can I convert it to DateTime, and allow for missing?

This doesn’t work:

datetimes = convert(Vector{Union{DateTime,Missing}}, df[1])

MethodError: Cannot `convert` an object of type DataValues.DataValue{Any} to an object of type DateTime

[nalimilan]

DataValue entries should never appear in a data frame. That's probably a bug in the Queryverse package you used to import the data.