json - 在HIVE中解析此JSON

Question

我对JSON完全陌生。我在HIVE列之一中的JSON下面。我不确定如何安排{}和[]，但是尽了最大的努力。

{
  "main_key":
  [
    {
       "type":"RESPONSIBLE",
       "lastName":"John"
    },
    {
       "ids":
       [
         {
            "id":"001815015",
            "qual":"PIN"
          },
          {
            "id":"592852900",
            "qual":"TIN"
          }
        ],
            "type":"BILLING",
            "lastName":"Joe"
    },
    {
        "ids":
        [
                {
                    "id":"002329056",
                    "qual":"PIN"
                }
        ],
                    "type":"SVC",
                    "lastName":"Jame"
    }
    ]
}

上面的JSON应该解析如下。需要Hive查询可以做到这一点。


谢谢，

Answer 1

您可以使用get_json_object或json_tuple
示例:src_json表是单列(json)，单行表:

+----+
                               json
+----+
{"store":
  {"fruit":\[{"weight":8,"type":"apple"},{"weight":9,"type":"pear"}],
   "bicycle":{"price":19.95,"color":"red"}
  },
 "email":"amy@only_for_json_udf_test.net",
 "owner":"amy"
}
+----+



hive> SELECT get_json_object(src_json.json, '$.owner') as owner FROM src_json;
amy
 
hive> SELECT get_json_object(src_json.json, '$.store.fruit\[0]')  as fruitdata FROM src_json;
{"weight":8,"type":"apple"}
 
hive> SELECT get_json_object(src_json.json, '$.non_exist_key') FROM src_json;
NULL

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