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PolyBase で外部データソースとしてAzure Management を連携利用

CData ODBC Driver for Azure Management とSQL Server 2019 のPolyBase を使って、リアルタイムAzure Management 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 Azure Management data を組み合わせて使うことで、SQL Server データと同じようにAzure Management 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Azure Management data の設定から、T-SQL クエリを使ったAzure Management data へのアクセスを行います。

The CData ODBC drivers offer unmatched performance for interacting with live Azure Management data using PolyBase due to optimized data processing built into the driver. When you issue complex SQL queries from SQL Server to Azure Management, the driver pushes down supported SQL operations, like filters and aggregations, directly to Azure Management 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 Azure Management data, using a single query to pull data from distributed sources.

Azure Management 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 Azure Management Sys is created automatically).

ユーザー資格情報の接続プロパティを設定せずに接続できます。次のプロパティを設定します。
SubscriptionId(オプション):Azure API Management エンドポイントにはサブスクリプションId が必要です。指定しない場合は、本製品はアカウントで使用可能な最初のサブスクリプションId を取得します。
Tenant(オプション):デフォルトと異なるテナントに認証したい場合は、テナントを指定できます。これは、デフォルトのテナントに所属していないSubscription と連携するために必要です。
接続すると、本製品はデフォルトブラウザでAzure Data Management OAuth エンドポイントを開きます。ログインして、本製品にアクセス許可を与えます。本製品がOAuth プロセスを完了します。

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

Azure Management 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 Azure Management data.

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

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

Create an External Data Source for Azure Management

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

For Azure Management, 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_azuredatamanagement_source
WITH ( 
  LOCATION = 'odbc://SERVERNAME[:PORT]',
  CONNECTION_OPTIONS = 'DSN=CData Azure Management Sys',
  -- PUSHDOWN = ON | OFF,
  CREDENTIAL = azuredatamanagement_creds
);

Azure Management のExternal Table を作成

After creating the external data source, use CREATE EXTERNAL TABLE statements to link to Azure Management data from your SQL Server instance. The table column definitions must match those exposed by the CData ODBC Driver for Azure Management. 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 Azure Management Subscriptions would look similar to the following:

CREATE EXTERNAL TABLE Subscriptions(
  DisplayName [nvarchar](255) NULL,
  AuthorizationSource [nvarchar](255) NULL,
  ...
) WITH ( 
  LOCATION='Subscriptions',
  DATA_SOURCE=cdata_azuredatamanagement_source
);

Having created external tables for Azure Management 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 Azure Management, freeing up local resources and computing power. Download a free, 30-day trial of the ODBC Driver for Azure Management and start working with live Azure Management data alongside your SQL Server data today.

 
 
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