3.5.4.3. S3 JSON 解析

{
    "firstName": "Joe",
    "lastName": "Jackson",
    "gender": "male",
    "age": "twenty"
},

{
    "firstName": "Joe_2",
    "lastName": "Jackson_2",
    "gender": "male",
    "age": 21
},

"phoneNumbers":
[
    { "type": "home1", "number": "734928_1","addr": 11 },
    { "type": "home2", "number": "734928_2","addr": 22 }
],

"key_after_array": "XXX",

"description" :
{
    "main_desc" : "value_1",
    "second_desc" : "value_2"
}

# the from-clause define a single row.
# _1 points to root object level.
# _1.age appears twice in Documnet-row, the last value is used for the operation.
query = "select _1.firstname,_1.key_after_array,_1.age+4,_1.description.main_desc,_1.description.second_desc from s3object[*].aa.bb.cc;";

expected_result = Joe_2,XXX,25,value_1,value_2