Getting Started with IBM Data Studio for DB2

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310 Getting Started with IBM Data Studio for DB2 for web service clients to handle the data. In Appendix E, we show how you can work around this limitation. You can now try to test the other web service operations with the Web Services Explorer. Figure 10.27 shows you the result of theGetBestSellingProductsByMonth operation when using HTTP POST, which just displays the results as an XML document. Figure 10.27– HTTP POST response is shown as an XML document 10.10 Exercises 1. Test theRankEmployee operation. All English ranking descriptions can be found in theRANKING_DESCRIPTION_EN column of theGOSALESHR.RANKING table. You can use any of the rankings as an input value for theRANKING parameter while testing. Select anEMPLOYEE_CODE entry from theGOSALESHR.EMPLOYEE table. Verify that your new ranking has been added by looking in theGOSALESHR.RANKING_RESULTS table. 2. Create a new web service operation that updates the ranking for a given EMPLOYEE_CODE entry and a givenYEAR entry to a givenRANKING_DESCRIPTION entry. 3. Start theGET_CUSTOMER_NAME operation by using a web browser via the HTTP GET binding. Hint: You can run the HTTP GET binding from the Web Services Explorer, then copy-and-paste the URL into a web browser.
Chapter 10 – Developing data web services 311 4. Change the SQL statement that represents theGetBestSellingProductsByMonth operation to allow a user to provide the month name instead of the month number. Hint: You can use the following expression to find the month name for the GOSALES.INVENTORY_LEVELS.INVENTORY_MONTH column: MONTHNAME('2009-' || TRIM(CHAR(INVENTORY_MONTH)) || '-01- 00.00.00') 5. Check out the behavior for binary data types. Create a new web service operation calledcheckBinary with the following statement: SELECT BLOB(CAST(:input AS VARCHAR(255)) FROM SYSIBM.SYSDUMMY1 Deploy the web service with the new operation. Run the operation by providing any string value as input. Observe the result. Try to find out the XML data type and explain why binary data is represented in this form. Hint: You can find the XML data type by examining the XML schema section in the WSDL document of the web service. 10.11 Summary In this chapter, you’ve learned about the architecture of data web services, which provides the ability to wrap web services around business logic that is provided by SQL statements, XQuery statements, or stored procedures. The services can be bound to either SOAP or REST style bindings, providing the flexibility for a variety of clients to start and consume the services. This chapter walked you through the process of creating a data web service that includes two stored procedures and two SQL statements and binding them to both SOAP and simple HTTP protocols. The SOAP binding can easily be tested using the Web Services Explorer. For information about testing other bindings, see Appendix E. 10.12 Review questions 1. What are the three bindings supported for testing by the Data Studio Web Services Explorer? 2. What does it mean when the data web service name in the Data Project Explorer has an asterisk by it? 3. To see the SOAP request and response messages, which view do you need to open from the Web Services Explorer? 4. As a best practice, is it better to use named parameter markers or question mark for the SQL used in data web services? 5. The approach of creating a data web service based on existing database logic is called ________________ development. 6. You create a new data web service in: A. A data design project B. A data development project
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Table of contents 5 Table of conten
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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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193 Chapter 6 - Managing jobs Job m
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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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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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