Neoview Guide to Stored Procedures in Java (R2.3, R2.4)

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Table of Contents

About This Document.......................................................................................................13

Intended Audience................................................................................................................................13

New and Changed Information in This Edition...................................................................................13

Document Organization.......................................................................................................................13

Notation Conventions...........................................................................................................................14

General Syntax Notation.................................................................................................................14

Related Documentation........................................................................................................................16

Neoview Customer Library.............................................................................................................16

Publishing History................................................................................................................................17

HP Encourages Your Comments..........................................................................................................17

1 Introduction...................................................................................................................19

What Is an SPJ?.....................................................................................................................................19

Benefits of SPJs......................................................................................................................................19

Java Methods Callable From Neoview SQL....................................................................................20

Common Packaging Technique.......................................................................................................20

Security............................................................................................................................................20

Increased Productivity.....................................................................................................................20

Portability........................................................................................................................................21

How Do I Use SPJs in a Neoview Database?........................................................................................21

2 Getting Started.............................................................................................................23

Required Software on the Neoview Platform.......................................................................................23

Required Software on the Client Workstation......................................................................................23

Java Development Kit......................................................................................................................23

Neoview DB Admin........................................................................................................................23

Recommend Software on the Client Workstation................................................................................24

Neoview Command Interface (NCI)...............................................................................................24

Neoview JDBC Type 4 Driver..........................................................................................................24

3 Developing SPJ Methods.............................................................................................25

Guidelines for Writing SPJ Methods.....................................................................................................25

Signature of the Java Method..........................................................................................................25

Public Access and Static Modifiers............................................................................................25

Void Return Type.......................................................................................................................25

Java Parameters..........................................................................................................................25

Returning Output Values From the Java Method...........................................................................26

Using Arrays for Output Parameters.........................................................................................27

Type Mapping of Output Parameters........................................................................................27

Returning Stored Procedure Result Sets.........................................................................................27

Using the main() Method................................................................................................................29

Null Input and Output....................................................................................................................29

Static Java Variables.........................................................................................................................29

Nested Java Method Invocations.....................................................................................................29

Accessing a Neoview Database............................................................................................................29

Use of java.sql.Connection Objects..................................................................................................30

Using JDBC Method Calls...............................................................................................................30

Referring to Database Objects in an SPJ Method............................................................................31

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