https://stackoverflow.com/questions/76098202/trying-to-flatten-a-json-dataframe-in-scala-which-has-special-characters-and-al

1.json

{
  "ExportSchema" : [
    {
      "Application" : "fuzzitDwh",
      "EntityType" : "4",
      "CountryCode" : "AT",
      "ExportType" : "DIFF",
      "ExportUtcDateTime" : "2021-12-15T01:45:01",
      "LastExportUtcDateTime" : "2021-12-14T10:19:37",
      "FileName" : "UL_DataLake_fuzzitDwh_MaterialExternal_AT_DIFF_20211215_014501.json"
    }
  ],
  "ExportData" : [
    {
      "Country/" : [
        {
          "Country/Code" : "AT",
          "MaterialExternal" : [
            {
              "WholesalerCode" : " A__METR",
              "M%at-erial()+ ExternalCode" : "26780",
              "Attributes" : {
                "Name" : "KALBSFOND HELL PASTOES 1KG KNR"
              }
            },
            {
              "WholesalerCode" : "A__ESVP",
              "M%at-erial()+ ExternalCode" : "38636",
              "Attributes" : {
                "MaterialInternalCodeFromWholesaler" : "38636",
                "Name" : "B&J 465ml Netflix&Chill'd CL1x8x180EB"
              }
            },
            {
              "WholesalerCode" : "A__ESVP",
              "M%at-erial()+ ExternalCode" : "39767",
              "Attributes" : {
                "MaterialInternalCodeFromWholesaler" : " 39767",
                "Name" : "B&J 170G ChocChipCookieDghCL3b X8x147EB"
              }
            }
          ]
        }
      ]
    }
  ]
}