NiFi JsonPathReader解析数组问题

Question

我正在尝试使用GetFile-> CovertRecord-> PutFile处理器将JSON解析为csv。我的示例JSON看起来像：

[
    {
        "id": "A1",
        "value": "blue",
        "num": [5,6,7]
    }, 
    {
        "id": "B2",
        "value": "red",
        "num": [1,2,3]
    }, 
    {
        "id": "C3",
        "value": "green",
        "num": [4,8,9]
    }
]

配置JsonPathReader和CSVRecordSetWriter控制器后，我可以成功地将csv输出解析为JSON，如下所示：

id, value,  num
A1, blue,   [5, 6, 7]
B2, red,    [1, 2, 3]
C3, green,  [4, 8, 9] 

JsonPathReader配置中的Avro模式如下：

{
    "type" : "record",
    "namespace" : "data",
    "name" : "stuff",
    "fields" : [
        {"name" : "id" , "type" : "string"},
        {"name" : "value" , "type" : "string"},
        {"name" : "num" , "type" : {"type" : "array", "items" : "int"}}
     ]
}

但是我最终需要csv输出看起来像：

id, value,  num
A1, blue,   5
A1, blue,   6
A1, blue,   7
B2, red,    1
B2, red,    2
B2, red,    3
C3, green,  4
C3, green,  8
C3, green,  9

使用标准的NiFi处理器和控制器是否可以？我试图避免构建自定义处理器。