Unable to Create Table in Amazon Athena

问题

I tried creating a table in Athena for my nested json files in s3, but receiving an error:

line 1:8: no viable alternative at input 'create external' (service: amazonathena; status code: 400; error code: invalidrequestexception; request id: dcea57c7-b801-41a4-8edb-e42eb1608fea)

Table name and fields seem okay, also have attached sample json from my s3 source. Have referred the official documentation of Athena. Also, let me know if and how can I add nested fields from Create Table wizard in Athena.

My query is:

    CREATE EXTERNAL TABLE bhaskar_clevertap(
         eventName string,
         ts bigint,
         eventProps struct<
         ContentCategory: string,
         Previous_screen: string,
         Platform: string,
         Category: string,
         Status: string,
         CT Source: string,
         CT Latitude: int,
         CT Longitude: int,
         Phone: bigint,
         ADID: string,
         Email: string,
         ScreenName: string,
         DBID: bigint,
         App_version: string,
         Device_ID: string,
         CT App Version: string>,
         profile struct< 
         objectId: string,
         all_identities: string,
         identity: bigint,
         platform: string,
         phone: bigint,
         name: string,
         email: string,
         push_token: string>,
         deviceInfo struct<
         osVersion: int,
         sdkVersion: int,
         make: string,
         model: string,
         appVersion: string,
         browser: string,
         dpi: int>,
         dimensions struct<
         width: int,
         height: int,
         unit: string> 
) 
ROW FORMAT SERDE 'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
 LOCATION 's3://clevertap-data-bhaskarapp/' 

A sample json object would loook like:

{
"eventName": "ScreenView",
"ts": 20200106073433,
"eventProps": {
    "ContentCategory": "ePaper",
    "Previous_screen": "",
    "Platform": "Android",
    "Category": "ePaper",
    "Status": "LoggedIn",
    "CT Source": "Mobile",
    "CT Latitude": 25.613659,
    "CT Longitude": 85.101135,
    "Phone": "+917678284002",
    "ADID": "fc2adc9b-6e31-459c-9bee-d6039a263e5c",
    "Email": "1008894402@dbcorp.in",
    "ScreenName": "ePaper_BIHAR_पटना_पटना_Page3",
    "DBID": "1008894402",
    "App_version": "6.1.0",
    "Device_ID": "3fccfa7749a8fba2",
    "CT App Version": "6.1.0"
},
"profile": {
    "objectId": "__gfc2adc9b6e31459c9beed6039a263e5c",
    "all_identities": ["7678284***", "1008894402@****"],
    "identity": "7678284***",
    "platform": "Android",
    "phone": 917678284***,
    "name": "NA",
    "email": "1008894402@****",
    "push_token": "fcm:dAI-w-gLwyk:APA91bE5E3pz63NMnV9rxqMwYTsOtQnmwjI8ZdElIX98fo0qiCPVnvekDwMMt27tAuI1F5PZmufw1OLpC_6V_hE_n_9eUVn8tF7EqA9MUu80wionD2FYtj*****FrSQDnDJoTFVZFmqg"
},
"deviceInfo": {
    "osVersion": "7.0",
    "sdkVersion": "30501",
    "make": "Xiaomi",
    "model": "Redmi Note 4",
    "appVersion": "6.1.0",
    "browser": "MobileApp",
    "dpi": 480,
    "dimensions": {
        "width": 69,
        "height": 121,
        "unit": "mm"
    }
}

}

Kindly help me finding issues with my query.

回答1:

It is not very clear from Athena docs wrt to restrictions on column names. However, it seems to me that your problem stems from the fact that some fields (column names) have space in them, e.g. CT Source, CT Latitude, CT Longitude and CT App Version. I managed to create table by surrounding this name with backticks.

CREATE EXTERNAL TABLE bhaskar_clevertap_2(
         eventName string,
         ts bigint,
         eventProps struct<
            ContentCategory: string,
            Previous_screen: string,
            Platform: string,
            Category: string,
            Status: string,
            `CT Source`: string,
            `CT Latitude`: int,
            `CT Longitude`: int,
            Phone: bigint,
            ADID: string,
            Email: string,
            ScreenName: string,
            DBID: bigint,
            App_version: string,
            Device_ID: string,
            `CT App Version`: string>,
         profile struct< 
             objectId: string,
             all_identities: string,
             identity: bigint,
             platform: string,
             phone: bigint,
             name: string,
             email: string,
             push_token: string>,
         deviceInfo struct<
             osVersion: int,
             sdkVersion: int,
             make: string,
             model: string,
             appVersion: string,
             browser: string,
             dpi: int>,
         dimensions struct<
             width: int,
             height: int,
             unit: string> 
) 
ROW FORMAT SERDE 
    'org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe'
LOCATION 
    's3://clevertap-data-bhaskarapp/' 

来源：https://stackoverflow.com/questions/59930025/unable-to-create-table-in-amazon-athena