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Figure 6-51. Pointing the HTTP connection manager at the web service 5. Change the Server URL property to read http://www.webservicex.net/uszip.asmx wsdl. 6. Click Test Connection just to make sure a connection can be made. If it can t, check the URL in the Server URL property and also browse to it manually using Internet Explorer to make sure the site is up and the service is working. Once you have confirmed everything is fine, click OK. 7. Back on the main configuration screen, enter a path and filename to store a copy of the WSDL file. I have chosen c:\temp\zipinfows.wsdl, but it isn t important where it goes or what its name is, as long as security access is ensured. Your configuration screen should be looking similar to the one in Figure 6-52.

Database groups, deprecated since SQL Server 7, are still just about supported in SQL Server 2005 for backwards compatibility, but will apparently be removed in the next release. As in previous versions, you can add groups to a database using the sp_addgroup system stored procedure, but this really shouldn t be used any more.

Figure 6-52. Web Service Task configuration is beginning to come together. 8. Click Download WSDL, which is located toward the bottom of the window. After a few moments the message shown in Figure 6-53 should appear.

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Application roles allow us to define a security context for a specific application. After the application has connected to SQL Server, it calls the sp_setapprole system stored procedure, and from that point has the permissions assigned to the application role, rather than those of the user account under which the application is running. In SQL Server 2005, application roles are now created using the CREATE APPLICATION ROLE statement, rather than the sp_addapprole stored procedure: CREATE APPLICATION ROLE DataEntryAppRole WITH PASSWORD = 'gSLi87po(&$dK', DEFAULT_SCHEMA = Sales; The DEFAULT_SCHEMA clause is optional. We ll look at SQL Server 2005 schemas shortly.

Even if you don t have the full version of Visual Studio 2005 installed, you can still step through your code line by line. SQL Server 2005 comes with a pared-down version of VS, which you can use to debug code (it seems to be very similar in debugging functionality to the CLR debugger of previous .NET versions). You can t use this debugger directly with SQL assemblies (attempts to launch it are simply ignored), but it is possible to get around this by debugging your .NET code outside SQL Server before deploying the assembly. You ll see how to do this later in the chapter. The debugger can be launched programmatically by calling the Launch method of the System.Diagnostics.Debugger class, or it is launched automatically whenever an unhandled exception is thrown by a program. When either of these two events occurs, the user will be given the chance to select a debugger and start debugging, using any of the debuggers installed on the system, as shown in Figure 9-5.

Apart from the separation of schemas from users, which we ll look at when we consider schemascoped securables, object ownership isn t too different in SQL Server 2005. There are a couple of extra features worth mentioning, however. First is the new optional AUTHORIZATION clause in many CREATE statements that allows us to set the owner of the created object. For example, to specify that we want the new object to be owned by a user called John rather than the user who is executing the statement when creating a new database role, we use the following: CREATE ROLE NewDbRole AUTHORIZATION John; We can also change the owner of an object using the new ALTER AUTHORIZATION SQL statement. This takes the following form: ALTER AUTHORIZATION ON <entity_type>::<entity_name> TO <principal_name> Instead of providing the name of a principal as the new owner, we can specify SCHEMA OWNER, which will set the owner of the object to the owner of the schema to which it belongs. For example, to change the owner of the role we created previously from John to a user called Fred, we would use the following command: ALTER AUTHORIZATION ON ROLE::NewDbRole TO Fred;

Figure 6-53. The WSDL file has been downloaded. 9. Select the item labeled Input from the left side of the dialog. 10. Click the Service property and select USZip from the drop-down list. 11. Click the Method property and select GetInfoByZip from the drop-down list.

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