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

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

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

Salesforce Chatter 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 Salesforce Chatter Sys is created automatically).

Salesforce Chatter uses OAuth 2.0 authentication. To authenticate to Salesforce Chatter via OAuth 2.0, you will need to obtain the OAuthClientId, OAuthClientSecret, and CallbackURL by registering an app with Salesforce Chatter.

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

Salesforce Chatter 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 Salesforce Chatter data.

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

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

Create an External Data Source for Salesforce Chatter

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

For Salesforce Chatter, 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_salesforcechatter_source
WITH ( 
  LOCATION = 'odbc://SERVERNAME[:PORT]',
  CONNECTION_OPTIONS = 'DSN=CData Salesforce Chatter Sys',
  -- PUSHDOWN = ON | OFF,
  CREDENTIAL = salesforcechatter_creds
);

Salesforce Chatter のExternal Table を作成

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

CREATE EXTERNAL TABLE Users(
  Name [nvarchar](255) NULL,
  PostCount [nvarchar](255) NULL,
  ...
) WITH ( 
  LOCATION='Users',
  DATA_SOURCE=cdata_salesforcechatter_source
);

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

 
 
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