How to connect PolyBase to Suadeo

PolyBase for SQL Server allows you to query external data by using the same Transact-SQL syntax used to query a database table. When paired with the CData ODBC Driver for Suadeo, you get access to your Suadeo data directly alongside your SQL Server data. This article describes creating an external data source and external tables to grant access to live Suadeo data using T-SQL queries.

NOTE: PolyBase is only available on SQL Server 19 and above.

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

Connect to Suadeo

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 Suadeo Sys is created automatically).

The driver uses the OAuth 2.0 Resource Owner Password Credentials (ROPC) grant to authenticate to Suadeo. Authentication occurs directly using your credentials; there is no browser-based authorization flow or refresh token.

Set the following connection properties:

• URL: The base URL of your Suadeo instance.
• User: Your Suadeo username.
• Password: Your Suadeo password.
• AuthenticationName: The name identifier for the authentication configuration in your Suadeo instance. Different authentication names can be configured for different environments or use cases.

When you connect, the driver sends your credentials to the Suadeo OAuth token endpoint, receives an access token, and uses it for all subsequent requests. A new access token is obtained automatically when needed during the session.

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

Create an External Data Source for Suadeo Data

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 Suadeo data.

NOTE: IDENTITY and SECRET correspond with the User and Password properties for Suadeo.

CREATE DATABASE SCOPED CREDENTIAL suadeo_creds
WITH IDENTITY = 'suadeo_username', SECRET = 'suadeo_password';

Create an External Data Source for Suadeo

Execute a CREATE EXTERNAL DATA SOURCE SQL command to create an external data source for Suadeo with PolyBase:

• Set the LOCATION parameter , using the DSN and credentials configured earlier.

For Suadeo, set SERVERNAME to the URL or address for your server (e.g. 'localhost' or '127.0.0.1' for local servers; the remote URL for remote servers). 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_suadeo_source
WITH ( 
  LOCATION = 'odbc://SERVER_URL',
  CONNECTION_OPTIONS = 'DSN=CData Suadeo Sys',
  -- PUSHDOWN = ON | OFF,
  CREDENTIAL = suadeo_creds
);

Create External Tables for Suadeo

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

CREATE EXTERNAL TABLE Customers(
  Id [nvarchar](255) NULL,
  Name [nvarchar](255) NULL,
  ...
) WITH ( 
  LOCATION='Customers',
  DATA_SOURCE=cdata_suadeo_source
);

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