cpp/velox/tests/data/group.json

{
  "relations": [{
          "root": {
              "input": {
                  "aggregate": {
                      "common": {
                          "direct": {}
                      },
                      "input": {
                          "read": {
                              "common": {
                                  "direct": {}
                              },
                              "baseSchema": {
                                  "struct": {}
                              },
                              "localFiles": {
                                "items": [{
                                        "uriFile": "file:///tmp/tmp_file",
                                        "length": "31979",
                                        "parquet": {}
                                    }
                                ]
                            }
                          }
                      },
                      "groupings": [{}
                      ]
                  }
              }
          }
      }
  ]
}