Erreur dans Nested JSON Ruches

Question

je tentais de charger ces données JSON dans la ruche

{ 
    "id": "0001", 
    "type": "donut", 
    "name": "Cake", 
    "ppu": 0.55, 
    "batters": 
     { 
      "batter": 
       [ 
        { "id": "1001", "type": "Regular" }, 
        { "id": "1002", "type": "Chocolate" }, 
        { "id": "1003", "type": "Blueberry" }, 
        { "id": "1004", "type": "Devil's Food" } 
       ] 
     }, 
    "topping": 
     [ 
      { "id": "5001", "type": "None" }, 
      { "id": "5002", "type": "Glazed" }, 
      { "id": "5005", "type": "Sugar" }, 
      { "id": "5007", "type": "Powdered Sugar" }, 
      { "id": "5006", "type": "Chocolate with Sprinkles" }, 
      { "id": "5003", "type": "Chocolate" }, 
      { "id": "5004", "type": "Maple" } 
     ] 
} 

utilisant DDL commandes

ADD JAR /home/cloudera/Downloads/json-serde-1.3.6-SNAPSHOT-jar-with-dependencies.jar; 

CREATE EXTERNAL TABLE format.json_serde (
    `id` string, 
    `type` string, 
    `name` string, 
`ppu` float,  
    batters` struct < `batter`:array < struct <`bid`:string, `btype`:string >>>, 
    `topping`:array < struct<`tid`:int, `ttype`:string>> 
) 
ROW FORMAT SERDE 'org.openx.data.jsonserde.JsonSerDe'; 

jette moi error

FAILED: ParseException line 7:11 cannot recognize input near ':' 'array' '<' in column type </b> 

Answer 1

1. Vous avez des fautes de frappe
   ttype`: string doit être ttype: string
   battersstruct devrait être frappeurs struct
   en tête: tableau devrait être tableau en tête

2. cartographie JSON SerDe est fait par son nom.
   Les noms de vos champs de structure doivent correspondre aux noms réels, par ex. id et non bid ou tid, sinon vous obtiendrez des valeurs NULL pour ces champs.

3. Il existe déjà un Serotype JSON qui fait partie de l'installation de Hive. https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL#LanguageManualDDL-RowFormats&SerDe

---

create external table json_serde 
( 
    id  string 
    ,type string 
    ,name string 
    ,ppu  float 
    ,batters struct<batter:array<struct<id:string,type:string>>> 
    ,topping array<struct<id:string,type:string>> 
) 
row format serde 
'org.apache.hive.hcatalog.data.JsonSerDe' 
stored as textfile 
; 

---

select * from json_serde 
; 

---

+------+-------+------+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 
| id | type | name |  ppu  |                  batters                  |                             topping                             | 
+------+-------+------+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 
| 0001 | donut | Cake | 0.550000011920929 | {"batter":[{"id":"1001","type":"Regular"},{"id":"1002","type":"Chocolate"},{"id":"1003","type":"Blueberry"},{"id":"1004","type":"Devil'sFood"}]} | [{"id":"5001","type":"None"},{"id":"5002","type":"Glazed"},{"id":"5005","type":"Sugar"},{"id":"5007","type":"PowderedSugar"},{"id":"5006","type":"ChocolatewithSprinkles"},{"id":"5003","type":"Chocolate"},{"id":"5004","type":"Maple"}] | 
+------+-------+------+-------------------+--------------------------------------------------------------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 

Answer 2

Il a travaillé quand j'enlevé les points-virgules près de nappage. Merci

CREATE TABLE EXTERNE format.json_serde (
chaîne id,
type chaîne,
chaîne name,
ppu flotteur,

batters struct < batter: tableau < struct < bid: string, btype: string >>>,

topping tableau < struct < tid: string, ttype: string >> )