How to create Azure Analysis Services federated tables in MySQL



Use the SQL Gateway and the ODBC Driver to set up federated tables for Azure Analysis Services data in MySQL .

You can use the SQL Gateway to configure a MySQL remoting service and set up federated tables for Azure Analysis Services data. The service is a daemon process that provides a MySQL interface to the CData ODBC Driver for Azure Analysis Services: After you have started the service, you can create a server and tables using the FEDERATED Storage Engine in MySQL. You can then work with Azure Analysis Services data just as you would local MySQL tables.

Connect to Azure Analysis Services Data

If you have not already done so, provide values for the required connection properties in the data source name (DSN). You can use the built-in Microsoft ODBC Data Source Administrator to configure the DSN. This is also the last step of the driver installation. See the "Getting Started" chapter in the help documentation for a guide to using the Microsoft ODBC Data Source Administrator to create and configure a DSN.

To connect to Azure Analysis Services, set the Url property to a valid server, for instance, asazure://southcentralus.asazure.windows.net/server, in addition to authenticating. Optionally, set Database to distinguish which Azure database on the server to connect to.

Azure Analysis Services uses the OAuth authentication standard. OAuth requires the authenticating user to interact with Azure Analysis Services using the browser. You can connect without setting any connection properties for your user credentials. See the Help documentation for more information.

Configure the SQL Gateway

See the SQL Gateway Overview to set up connectivity to Azure Analysis Services data as a virtual MySQL database. You will configure a MySQL remoting service that listens for MySQL requests from clients. The service can be configured in the SQL Gateway UI.

Creating a MySQL Remoting Service in SQL Gateway (Salesforce is shown)

Create a FEDERATED Server and Tables for Azure Analysis Services Data

After you have configured and started the service, create a FEDERATED server to simplify the process of creating FEDERATED tables:

Create a FEDERATED Server

The following statement will create a FEDERATED server based on the ODBC Driver for Azure Analysis Services. Note that the username and password of the FEDERATED server must match a user account you defined on the Users tab of the SQL Gateway.

CREATE SERVER fedAAS
FOREIGN DATA WRAPPER mysql
OPTIONS (USER 'sql_gateway_user', PASSWORD 'sql_gateway_passwd', HOST 'sql_gateway_host', PORT ####, DATABASE 'CData AAS Sys');

Create a FEDERATED Table

To create a FEDERATED table using our newly created server, use the CONNECTION keyword and pass the name of the FEDERATED server and the remote table (Customer). Refer to the following template for the statement to create a FEDERATED table:

CREATE TABLE fed_customer (
  ...,
  country  TYPE(LEN),
  education  TYPE(LEN),
  ...,
)
ENGINE=FEDERATED
DEFAULT CHARSET=latin1
CONNECTION='fedAAS/customer';

NOTE: The table schema for the FEDERATED table must match the remote table schema exactly. You can always connect directly to the MySQL remoting service using any MySQL client and run a SHOW CREATE TABLE query to get the table schema.

Execute Queries

You can now execute queries to the Azure Analysis Services FEDERATED tables from any tool that can connect to MySQL, which is particularly useful if you need to JOIN data from a local table with data from Azure Analysis Services. Refer to the following example:

SELECT 
  fed_customer.country, 
  local_table.custom_field 
FROM 
  local_table 
JOIN 
  fed_customer 
ON 
  local_table.foreign_country = fed_customer.country;

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Azure Analysis Services Icon Azure Analysis Services ODBC Driver

The Azure Analysis Services ODBC Driver is a powerful tool that allows you to connect with live data from Azure Analysis Services, directly from any applications that support ODBC connectivity.

Access Azure Analysis Services data like you would a database - read, write, and update Azure Analysis Services AnalysisServicesData, etc. through a standard ODBC Driver interface.