Column names mis-match when loading certain columns

[Ossifragus]

The relative order of the loaded columns seem to be always the same of the relative order the whole data (Is the order specified in the metadata?). For example with a data consisting two columns "col1" and "col2", the code JDF.load(data; cols = ["col1", "col2"]) loads the data correctly, but with JDF.load(data; cols = ["col2", "col1"]) the data columns and their names would not match.

Please see the following example:

using RDatasets, JDF, DataFrames

JDF.save("iris.jdf", dataset("datasets", "iris"))
a = DataFrame(JDF.load("iris.jdf"))

c1 = ["Species", "PetalWidth"]
a1 = DataFrame(JDF.load("iris.jdf"; cols = c1)) # column mis-match

julia> first(a1, 5)
5×2 DataFrame
 Row │ Species  PetalWidth 
     │ Float64  Cat…       
─────┼─────────────────────
   1 │     0.2  setosa
   2 │     0.2  setosa
   3 │     0.2  setosa
   4 │     0.2  setosa
   5 │     0.2  setosa

c2 = ["PetalWidth", "Species"]
a2 = DataFrame(JDF.load("iris.jdf"; cols = c2)) # column match

julia> first(a2, 5)
5×2 DataFrame
 Row │ PetalWidth  Species 
     │ Float64     Cat…    
─────┼─────────────────────
   1 │        0.2  setosa
   2 │        0.2  setosa
   3 │        0.2  setosa
   4 │        0.2  setosa
   5 │        0.2  setosa

[xiaodaigh]

columns are loaded as specified in the order by cols. This is the intended behaviour though