Getting Startedwith pureQuery

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254 Getting Started with pureQuery have them execute stored procedures. When the parameters to the method are java.util.Map and pureQuery bean objects, and no com.ibm.pdq.runtime.handlers.CallHandlerWithParameters object is specified, pureQuery updates the properties of the Map or bean objects that represent OUT and INOUT parameters to the stored procedure. pureQuery can return the results of a stored procedure call as a com.ibm.pdq.runtime.StoredProcedureResult object, which contains methods for retrieving the updated values of OUT and INOUT parameters, as well methods for retrieving the query results in various formats. Both inline methods and annotated methods can return a StoredProcedureResult object. Additionally, annotated methods can have most of the return types available to methods with the @Select annotation, if they only need to return one query result from the stored procedure. When none of pureQuery built-in return types provide what your application needs, a com.ibm.pdq.runtime.handlers.CallHandlerWithParameters object can specify the return type. 12.6 Questions 1. How do you execute a stored procedure call in the inline style? 2. How do you declare an annotated method that executes a stored procedure call? 3. When you use certain formats to represent your OUT and INOUT parameters, pureQuery can update the objects with the new values. Which of the following formats can pureQuery update? A. Properties of java.util.Map objects B. Scalars C. Properties of pureQuery beans D. Elements of java.util.List objects 4. Which of the following information do com.ibm.pdq.runtime.StoredProcedureResult objects provide? A. How long the stored procedure took to run B. The updated values of OUT and INOUT parameters in an Object array (Object[]) C. Query results D. The names of the tables that were affected by the stored procedure 5. True or false: When you use a com.ibm.pdq.runtime.StoredProcedureResult object to get the results of your stored procedure call, you should get the query results before you call the getOutputParms() method.
Chapter 12 – Stored Procedures 255 6. A com.ibm.pdq.runtime.StoredProcedureResult object’s getOutputParms() method returns an Object array (Object[]). Which of the following describes the treatment of IN parameters with regards to this array? A. IN parameters are not included in the array. The size of the array is equal to the number of OUT and INOUT parameters. B. The items in the array that correspond to IN parameters are populated with null. C. The items in the array that correspond to IN parameters are populated with the values that were provided as input. D. None of the above 7. Imagine that you execute a stored procedure in which the fourth parameter is an INOUT parameter that you represent with an Integer object. Provide the code you use to get the updated value of that parameter. Assume that the method that you use returns a com.ibm.pdq.runtime.StoredProcedureResult object. 8. How do you free the database resources associated with a com.ibm.pdq.runtime.StoredProcedureResult object? 9. In the annotated-method style, if you only want to have pureQuery return one query result from your stored procedure call, you can declare the return type of the method to be the format in which you want to retrieve the query result. Which of these types are valid for the return type of such a method? A. java.util.Iterator B. java.sql.ResultSet C. java.util.List D. java.util.Map E. All of the above 10. If none of pureQuery’s ways of returning query results meet the needs of your application, what type of object can you use to define how a method returns the query results? 12.7 Exercise Section 12.4.1 described two ways in which we could declare the annotated method that executes the bonus_increase stored procedure. In that section, we used the way in which the return type of the annotated method is com.ibm.pdq.runtime.StoredProcedureResult. Now, modify the method to use the other way, in which the return type of the method is java.util.Iterator. You will need to use a
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G E T T I N G S T A R T E D W I T H
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Notices This information was develo
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Trademarks IBM, the IBM logo, DB2,
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1 Chapter 1 - Introduction to pureQ
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2 Chapter 2 - Installing pureQuery
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PART II - TOOLING
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PART III - SECURITY, PERFORMANCE, A
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6 Chapter 6 - The Client Optimizer:
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9 Chapter 9 - Persistence Framework
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9.1.1.1 JPA Chapter 9 - Persistence
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A Appendix A - Solutions to the rev
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B.1.3 The “Employee Information
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