HTTP request body -> PostgreSQL

Finally, thank you guys. @lungben, I checked your repositories. It looks very interesting.

I already found solution, what I wanted to do.

f = CSV.File(body, header=0, delim=';', skipto = 4, footerskip = 1)

df = f |> DataFrame

row_strings = map(eachrow(df)) do row
    s = ""
    for c in 1:length(row)
        s *= ismissing(row[c]) ? "," : "$(row[c]),"
    end
    s[1:end-1]*"\n"
end

copyin = LibPQ.CopyIn("COPY datasets FROM STDIN (FORMAT CSV, HEADER FALSE);", row_strings)

local conn
conn = connect()
execute(conn, copyin)