hive function get_json_object

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Reproduced

https://www.cnblogs.com/drjava/p/10486134.html

 

hive provides json analytic functions: get_json_object

 

Instructions

For jsonArray (json array), as xjson person table has data fields:

[{"name":"王二狗","sex":"男","age":"25"},{"name":"李狗嗨","sex":"男","age":"47"}]

Json take the first object is then hive sql:

SELECT get_json_object(xjson,"$.[0]") FROM person;

 The result is:

{"name":"王二狗","sex":"男","age":"25"}

Retrieves the first of the age field value json:

SELECT get_json_object(xjson,"$.[0].age") FROM person;

result

25

 

to sum up

get_json_object(param1,"$.param2")

 

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