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Configuring the Adapter for Microsoft Azure SQL Data Warehouse

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Configuring the adapter consists of specifying connection and authentication information for each of the connections you want to establish.

Declaring Connection Attributes

How to:

Reference:

In order to connect to a Microsoft Azure SQL database server, the adapter requires connection and authentication information. You supply this information using the SET CONNECTION_ATTRIBUTES command.

You can:

  • Enter connection and authentication information in the Web Console or the Data Management Console configuration panes. The consoles add the command to the profile you select: the global server profile (edasprof.prf), a user profile (user.prf), or a group profile (if supported on your platform).
  • Manually add the command in the global server profile (edasprof.prf), in a user profile (user.prf), or in a group profile (if supported on your platform).

You can declare connections to more than one Microsoft Azure SQL databases by including multiple SET CONNECTION_ATTRIBUTES commands. The actual connection to Microsoft Azure SQL takes place when the first query that references the connection is issued. If you issue multiple SET CONNECTION_ATTRIBUTES commands:

  • The connection named in the first SET CONNECTION_ATTRIBUTES command serves as the default connection.
  • If more than one SET CONNECTION_ATTRIBUTES command contains the same connection name, the adapter uses the attributes specified in the last SET CONNECTION_ATTRIBUTES command.

Procedure: How to Configure an Adapter

  1. From the Web Console sidebar, click Connect to Data.

    or

    From the Data Management Console, expand the Adapters folder.

    In the DMC, the Adapters folder opens. In the Web Console, the Adapters page opens showing your configured adapters.

  2. In the Web Console, click the New Datasource button on the menu bar and find the adapter on the drop-down list or, in the DMC, expand the Available folder if it is not already expanded.
    On the Web Console, you can select a category of adapter from the drop-down list or use the search option (magnifying glass) to search for specific characters.
  3. In the DMC, expand the appropriate group folder and the specific adapter folder. The group folder is described in the connection attributes reference.
  4. Right-click the adapter name and/or version and select Configure.

    The Add Adapter to Configuration pane opens.

  5. Enter values for the parameters required by the adapter, as described in the chapter for the specific adapter you want to configure.
  6. Click Configure. The configured adapter is added to the Adapters list in the DMC resources tree or the Configured list in the Web Console.
    In the Web Console, the adapter remains on the Available Adapters list with a check mark to indicate that at least one connection has been configured. You can configure additional connections from either the Configured or Available list by right-clicking the adapter and clicking Add Connection.

Reference: Connection Attributes for Microsoft Azure SQL Data Warehouse

The following list describes the connection attributes for which you can supply values. To complete the attribute declaration, click the Configure button.

Connection name

Logical name used to identify this particular set of connection attributes. The default is CON01.

Server

Name of the machine where Microsoft Azure SQL is running.

Security

There are three methods by which a user can be authenticated when connecting to a Microsoft Azure SQL:

  • Explicit. The user ID and password are explicitly specified for each connection and passed to Microsoft Azure SQL, at connection time, for authentication as a standard login. This option requires that Azure SQL security be set to Azure SQL and Windows.
  • Password Passthru. The user ID and password received from the client application are passed to Microsoft Azure SQL, at connection time, for authentication as a standard login. This option requires that Azure SQL security be set to Azure SQL and Windows.
  • Trusted. The adapter connects to Microsoft Azure SQL as an operating system login using the credentials of the operating system user impersonated by the server data access agent. This option works with either of Azure SQL security settings
User

Primary authorization ID by which you are known to the data source.

Password

Password associated with the primary authorization ID.

Default Database

Name of the Microsoft Azure SQL database used for this connection. The database name, including path, must be enclosed in single quotation marks. This parameter is optional. If not specified, it defaults to the database associated with the authorization ID.

Additional connection string keywords (optional)

Please refer to Microsoft Azure SQL documentation for all available connection string keywords used to change the behavior of the ODBC connection.

Select profile

Select a profile from the drop-down menu to indicate the level of profile in which to store the CONNECTION_ATTRIBUTES command. The global profile, edasprof.prf, is the default.

If you wish to create a new profile, either a user profile (user.prf) or a group profile if available on your platform (using the appropriate naming convention), choose New Profile from the drop-down menu and enter a name in the Profile Name field (the extension is added automatically).

Store the connection attributes in the server profile (edasprof).

Syntax: How to Declare Connection Attributes Manually on Windows

Explicit authentication. The user ID and password are explicitly specified for each connection and passed to Microsoft Azure SQL, at connection time, for authentication. 

ENGINE SQLADW SET CONNECTION_ATTRIBUTES [connection]
 server/userid,password [;dbname][;additional_connection_string_keywords]

Password passthru authentication. The user ID and password are explicitly specified for each connection and passed to Microsoft Azure SQL, at connection time, for authentication. 

ENGINE SQLADW SET CONNECTION_ATTRIBUTES [connection]
 server/[;dbname][;additional_connection_string_keywords]

Trusted authentication. The adapter connects to Microsoft Azure SQL as a Windows login using the credentials of the Windows user impersonated by the server data access agent. 

ENGINE SQLADW SET CONNECTION_ATTRIBUTES [connection]server/,[;dbname][;additional_connection_string_keywords]

Note: Enclose values that contain special characters in single quotation marks. If a value contains a single quotation mark, this quotation mark must be preceded by another single quotation mark, resulting in two single quotation marks in succession. For example, to specify the user ID Mary O'Brien, which contains both a blank and a single quotation mark, enter: 'Mary O' 'Brien'.

Overriding the Default Connection

How to:

Once connections have been defined, the connection named in the first SET CONNECTION_ATTRIBUTES command serves as the default connection. You can override this default using the SET DEFAULT_CONNECTION command.

Syntax: How to Change the Default Connection 

ENGINE SQLADW SET DEFAULT_CONNECTION connection

where:

SQLADW

Indicates the adapter. You can omit this value if you previously issued the SET SQLENGINE command.

connection

Is the connection defined in a previously issued SET CONNECTION_ATTRIBUTES command. If this name was not previously declared, the following message is issued: 

FOC1671, Command out of sequence

Note:

  • If you use the SET DEFAULT_CONNECTION command more than once, the connection name specified in the last command serves as the default connection.
  • The SET DEFAULT_CONNECTION command cannot be issued while an uncommitted transaction (LUW) is pending. In that case, the following message is issued: 
    FOC1671, Command out of sequence.

Example: Selecting the Default Connection

The following SET DEFAULT_CONNECTION command selects the database server named SAMPLE as the default database server: 

ENGINE SQLADW SET DEFAULT_CONNECTION SAMPLE

Controlling the Connection Scope

How to:

The SET AUTODISCONNECT command controls the persistence of connections when using the adapter for each of the connections you want to establish.

Syntax: How to Control the Connection Scope 

ENGINE SQLADW SET AUTODISCONNECT ON {FIN|COMMAND|COMMIT}

where:

SQLADW

Indicates the adapter. You can omit this value if you previously issued the SET SQLENGINE command.

FIN

Disconnects automatically only after the session has been terminated. FIN is the default value.

COMMAND

Disconnects automatically after each request. Depending on how often the event occurs, the SET AUTODISCONNECT command may result in considerable overhead. Almost all of this overhead is not related to the server. It is related to the operating system and the data source.

COMMIT

Disconnects automatically only after COMMIT or ROLLBACK is issued as a native SQL command.

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