Vcat does not append DataFrame rows as it did in 0.10

Specific Domains Data
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Thanks for the clarification on “science”.

What are the open items to be addressed in your suggestion? I see:

  1. Whether to modify columns to allowmissing!
    • Changing type to Union{T, missing}
    • Tricky bit in there if the column is not an Array
  2. Whether to change the actual type of the column
    • e.g. Joining a Int with Float64
  3. Sources with differing column order (fixed in new vcat)
  4. Determining a new column order

Is there more we have talked about?