PolyBase で外部データソースとしてYouTube を連携利用

CData ODBC Driver for YouTube とSQL Server 2019 のPolyBase を使って、リアルタイムYouTube data に外部データソースとしてアクセス。

SQL Server のPolyBase は、データベーステーブルをクエリするTransact-SQL シンタックスを使って、外部データにクエリする仕組みです。 CData ODBC Drivers for YouTube data を組み合わせて使うことで、SQL Server データと同じようにYouTube data へのアクセスが可能です。 本記事では、PolyBase 外部データソースへのYouTube data の設定から、T-SQL クエリを使ったYouTube data へのアクセスを行います。

The CData ODBC drivers offer unmatched performance for interacting with live YouTube data using PolyBase due to optimized data processing built into the driver. When you issue complex SQL queries from SQL Server to YouTube, the driver pushes down supported SQL operations, like filters and aggregations, directly to YouTube and utilizes the embedded SQL engine to process unsupported operations (often SQL functions and JOIN operations) client-side. And with PolyBase, you can also join SQL Server data with YouTube data, using a single query to pull data from distributed sources.

YouTube への接続

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs. To create an external data source in SQL Server using PolyBase, configure a System DSN (CData YouTube Sys is created automatically).

YouTube への接続には、OAuth 認証標準を使います。ユーザーアカウントまたはサービスアカウントで認証できます。組織全体のアクセススコープを本製品に許可するには、サービスアカウントが必要です。下記で説明するとおり、本製品はこれらの認証フローをサポートします。

サービスアカウントには、ブラウザによるユーザー認証なしのサイレント認証があります。また、サービスアカウントを使用して、エンタープライズ全体のアクセススコープを本製品に委任することもできます。詳細はヘルプドキュメントを参照してください。

Click "Test Connection" to ensure that the DSN is connected to YouTube properly. Navigate to the Tables tab to review the table definitions for YouTube.

YouTube Data の外部データソースの作成

After configuring the connection, you need to create a master encryption key and a credential database for the external data source.

Creating a Master Encryption Key

Execute the following SQL command to create a new master key, 'ENCRYPTION,' to encrypt the credentials for the external data source.

CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'password';

Creating a Credential Database

Execute the following SQL command to create credentials for the external data source connected to YouTube data.

NOTE: Since YouTube does not require a User or Password to authenticate, you may use whatever values you wish for IDENTITY and SECRET.

CREATE DATABASE SCOPED CREDENTIAL youtube_creds
WITH IDENTITY = 'username', SECRET = 'password';

Create an External Data Source for YouTube

Execute the following SQL command to create an external data source for YouTube with PolyBase, using the DSN and credentials configured earlier.

For YouTube, set SERVERNAME to 'localhost' or '127.0.0.1' and leave PORT empty. PUSHDOWN is set to ON by default, meaning the ODBC Driver can leverage server-side processing for complex queries.

CREATE EXTERNAL DATA SOURCE cdata_youtube_source
WITH ( 
  LOCATION = 'odbc://SERVERNAME[:PORT]',
  CONNECTION_OPTIONS = 'DSN=CData YouTube Sys',
  -- PUSHDOWN = ON | OFF,
  CREDENTIAL = youtube_creds
);

YouTube のExternal Table を作成

After creating the external data source, use CREATE EXTERNAL TABLE statements to link to YouTube data from your SQL Server instance. The table column definitions must match those exposed by the CData ODBC Driver for YouTube. You can refer to the Tables tab of the DSN Configuration Wizard to see the table definition.

Sample CREATE TABLE Statement

The statement to create an external table based on a YouTube Videos would look similar to the following:

CREATE EXTERNAL TABLE Videos(
  Title [nvarchar](255) NULL,
  ViewCount [nvarchar](255) NULL,
  ...
) WITH ( 
  LOCATION='Videos',
  DATA_SOURCE=cdata_youtube_source
);

Having created external tables for YouTube in your SQL Server instance, you are now able to query local and remote data simultaneously. Thanks to built-in query processing in the CData ODBC Driver, you know that as much query processing as possible is being pushed to YouTube, freeing up local resources and computing power. Download a free, 30-day trial of the ODBC Driver for YouTube and start working with live YouTube data alongside your SQL Server data today.

 
 
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