Introducing Windows Azure- P53 potx

CHAPTER 8 ■ SQL AZURE 258 4. Click Next. SQL Server Management Studio will generate the scripts in a new SQL script edit window. Figure 8-14 shows a successful generation. Figure 8-14. The scripts were successfully generated 5. Log in to the Azure platform portal at https://lx.azure.microsoft.com/ and create a database AzureForDotNetDeveloper from SQL Azure in the cloud (recall that the screenshot shown in Figure 8-3 shows the created database). 6. Copy the previously generated script to the clipboard or save it into a file. Close SQL Server Management Studio and reopen it by following the steps shown in Figure 8-4 to establish a connection to the AzureForDotNetDeveloper database in the cloud. 7. If you run the generated script without any modification, then you will get an error message as Listing 8-8 shows. Listing 8-8. Error Message from Running Scripts Generated by SQL Server Management Studio Against SQL Azure Without Modification Msg 195, Level 15, State 5, Line 2 'ANSI NULLS' is not a recognized SET option. Msg 40512, Level 16, State 1, Procedure InsertInstanceState, Line 3 Deprecated feature 'Data types: text ntext or image' is not supported in this« version of SQL Server. Msg 195, Level 15, State 5, Line 2 CHAPTER 8 ■ SQL AZURE 259 'ANSI NULLS' is not a recognized SET option. Msg 40512, Level 16, State 1, Procedure InsertCompletedScope, Line 5 Deprecated feature 'Data types: text ntext or image' is not supported in this« version of SQL Server. Msg 195, Level 15, State 5, Line 2 'ANSI NULLS' is not a recognized SET option. Msg 195, Level 15, State 5, Line 2 'ANSI NULLS' is not a recognized SET option. Msg 40517, Level 16, State 1, Line 16 Option 'pad index' is not supported in this version of SQL Server. 8. Modify the output script as follows. a. Delete all: SET ANSI NULLS ON GO b. Delete all: PAD INDEX = OFF, c. Delete all: ALLOW ROW LOCKS = ON, ALLOW PAGE LOCKS = ON d. And, replace it with the following: ALLOW ROW LOCKS = OFF, ALLOW PAGE LOCKS = OFF e. Delete: SORT IN TEMPDB = OFF f. The first release of SQL Azure does not support partitions. The KEY constraint statement for all table-creation scripts needs to be removed and replaced with a separate script. For example, the original script for creating a data table generated by SQL Server Management Studio should look like Listing 8-9. The highlighted parts need to be removed and replaced with a separate KEY constraint statement as Listing 8-10 shows: Listing 8-9. Table-creating Script Generated by SQL Management Studio CREATE TABLE [dbo].[UserTable]( [UserID] [int] IDENTITY(1,1) NOT NULL, [Password] [nvarchar](100) NULL, [FirstName] [nvarchar](100) NOT NULL, [LastName] [nvarchar](100) NOT NULL, [Timestamp] [timestamp] NOT NULL, PRIMARY KEY CLUSTERED ( [UserID] ASC )WITH (STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY] ) ON [PRIMARY] GO CHAPTER 8 ■ SQL AZURE 260 Listing 8-10. Replace the KEY Constraint Statement from Listing 8-9 with a Separate ALTER TABLE Script to Assign a Key to a Table ALTER TABLE [UserTable] ADD CONSTRAINT ID PK PRIMARY KEY (UserID) g. Remove the boldface lines in the CREATE NONCLUSTERED INDEX scripts generated by SQL Server Management Studio as shown in Listing 8-11. Listing 8-11. Remove Code from All Index-creating Scripts CREATE NONCLUSTERED INDEX [IX UserTable FirstName] ON [dbo].[UserTable] ( [FirstName] ASC )WITH (STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF,« ONLINE = OFF) ON [PRIMARY] GO 9. Try to resolve all issues if there are other complaints from executing the generated scripts, and you will successfully run the script against the SQL Azure cloud database. You can run a query to verify that the expected tables have been created as shown in Figure 8-6. SELECT * FROM sys.databases SQL Azure Application Developing Tool: SQLAzureConnect In this section I am going to present a Windows application designed and developed for .NET developers to access SQL Azure services. This project will show you how to use ADO.NET to create a connection to SQL Azure services to execute SQL queries and stored procedures just as you do from SQL Server Management Studio. The major added value provided by this tool are detailed below. They make this application a very handy tool for SQL Azure or on-premises SQL application development. It provides: • A quick way to switch back and forth between SQL Azure cloud services and traditional on-premises SQL Server environments. • A SQL data access component class that can be used for both SQL Azure and on- premises SQL application development. • XML data-driven SQL query and stored procedure composition, editing, and executing, and UI dynamic factoring. A SQLAccessHelper class makes SQL query and stored procedure execution from C# extremely easy. All scripts and parameters needed for a stored procedure can be put into an XML data file or added on the fly and executed using this tool. CHAPTER 8 ■ SQL AZURE 261 Functions of SQLAzureConnect A screenshot of SQLAzureConnect is shown in Figure 8-15. Two radio buttons can be found to the left of the button Test Connection, which allows users to quickly switch the connection back and forth between the SQL Azure cloud service and on-premises SQL workstation environments. A new SQL service can be added by clicking the Add Service button. The script box is below the text box Description. Figure 8-15. Screenshot of SQLAzureConnect There are two ways to execute a script. One way is to click the Execute button, and the other way is to select and highlight the text and press F5. If there is a script selected, the caption of the Execute button turns to Execute Selected, and the background color of the button changes, as Figure 8-16 shows. CHAPTER 8 ■ SQL AZURE 262 Figure 8-16. The caption of the Execute button turns to Execute Selected, and the background color turns to gold There are two SQL execution options selected from a pair of radio buttons, Query and Storedprocedure. When Storedprocedure is selected, you can add and delete parameters required by a stored procedure. A specific SQL Azure service execution can be navigated using the tabs of the tab control in the window. The results of executing the SQL service are displayed in the bottom window, along with the error report. Figure 8-17 shows the results of the connection test. All the newly created service configuration data can be saved as an XML data file and played back later. (You also can manually create an XML data file and load it into this tool to execute.) Next we are going to go over the XML schema and data file that are the driving force of this tool. Figure 8-17. Connect to SQL Azure test results . SQL Azure Application Developing Tool: SQLAzureConnect In this section I am going to present a Windows application designed and developed for .NET developers to access SQL Azure services. This