{
    "_yql_row_spec" = {
        "Type" = [
            "StructType";
            [
                [
                    "rn";
                    [
                        "DataType";
                        "Int32"
                    ]
                ];
                [
                    "d32";
                    [
                        "DataType";
                        "String"
                    ]
                ];
                [
                    "dt64";
                    [
                        "DataType";
                        "String"
                    ]
                ];
                [
                    "ts64";
                    [
                        "DataType";
                        "String"
                    ]
                ]
            ]
        ]
    }
}