??????Flink SQL??UDF????????????????json????????

[lonely Wanderer]

??????????
??????????Flink(1.8)SQL 
??UDF,????????json????name??????name??value????????????????????????????????????????????????????????????????????????
 (e.g.??appKey) ????????????
??json:
{"appKey": "qq", "eventId": "18", "name" : 
[{"a":"jack","b":"mark","c":"tark"},{...},...]}
????????json??
{"appKey": "qq", "eventId": "18", 
"name_a":"jack","name_b":"mark","name_c":"tark"}
???????????? ?? ?????????????????? ????????????