Getting Started with IBM Data Studio for DB2

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292 Getting Started with IBM Data Studio for DB2 5. Click Finish. You have successfully added the WebSphere Application Server Community Edition instance to your Data Studio, and the server definition is also listed in the Servers view, as shown Figure 10.8. Figure 10.8 – The new server instance in the Servers view 10.4 Create a data development project After all the preparation is done you can start creating your first web service. All you need is an active connection to your DB2 instance and a data development project based on that connection. Using the instructions shown in Chapter 2, connect to theGSDB sample database and create a new data development project calledWebServices. We will be using tables and stored procedures from theGSDB database to create a new data web service. Figure 10.9 shows the new data development project and the connection to theGSDB sample database. Figure 10.9 – The WebServices data development project
Chapter 10 – Developing data web services 293 10.5 Define SQL statements and stored procedures for web service operations Now it’s time for you to decide what database data and logic should be exposed as web service operations. Typically a web service represents a set of operations with business logic which are grouped together because they are related – mainly from a business level perspective, but also for other reasons like security requirements, data structures, quality of service, and so on. In the database world, stored procedures are the prime candidates to become web service operations since they can contain a significant amount of business logic. However, an SQL statement can also be seen as a set of business logic – for example a SELECT statement that retrieves customer information. The SQL statements and stored procedures used for this example are relatively simple. 10.5.1 Stored procedures used in the web service Although you usually create web services using existing database operations, we need to create a couple of stored procedures here so we can show you how to use them in data web services. If you want to follow along with the steps in the chapter, you will need to create the following procedures as well: GET_CUSTOMER_NAME has input and output parameters PRODUCT_CATALOG returns a result set. The logic is kept simple since we focus on how to add a stored procedure to a web service rather than the stored procedure programming itself. We use SQL stored procedures here, but you can add procedures written in any language to a web Service. GET_CUSTOMER_NAME This procedure returns customer information for a given customer ID. It is created under theGOSALESCT schema. It has only input and output parameters. Using the information you learned in Chapter 8, create the following procedure (you can cut and paste the text below into the SQL procedure editor). Be sure to deploy it into theGOSALESCT schema. CREATE PROCEDURE GOSALESCT.GET_CUSTOMER_NAME( IN CUSTOMERID INTEGER, OUT FIRST_NAME VARCHAR(128), OUT LAST_NAME VARCHAR(128), OUT PHONE_NUMBER VARCHAR(128)) SPECIFIC GOSALESCT.GET_CUSTOMER_NAME BEGIN SELECT CUST_FIRST_NAME INTO FIRST_NAME FROM GOSALESCT.CUST_CUSTOMER WHERE CUST_CODE = CUSTOMERID; SELECT CUST_LAST_NAME INTO LAST_NAME FROM GOSALESCT.CUST_CUSTOMER WHERE CUST_CODE = CUSTOMERID; SELECT CUST_PHONE_NUMBER INTO PHONE_NUMBER FROM GOSALESCT.CUST_CUSTOMER WHERE CUST_CODE = CUSTOMERID; END Listing 10.1 – GET_CUSTOMER_NAME procedure
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3 Notices This information was deve
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Table of contents 5 Table of conten
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3.3.1 Exporting data...............
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Chapter 7 - Tuning queries ........
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11.4 Community and resources ......
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Preface 13 Keeping your skills curr
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around the world have participated
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17 About the authors Dimple Bhatia
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Contributors 19 The following peopl
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21 Acknowledgements The authors owe
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24 Getting Started with IBM Data St
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100 Getting Started with IBM Data S
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103 Chapter 3 - Maintaining the dat
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159 Chapter 5 - Creating SQL and XQ
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Chapter 6 - Managing jobs 209 6.6.2
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213 Chapter 7 - Tuning queries In t
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237 Chapter 8 - Developing SQL stor
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355 Appendix D - The Sample Outdoor
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Appendix E - Advanced topics for de
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E.5.4 Data web services artifacts A
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References 391 References [1] HAYES
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References 393 Books and articles 1
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396 Getting started with IBM Data S
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