Error-Message Handling

IN THIS CHAPTER

  • The Basics of Error-Message Handling
  • Handling Errors
  • Deficiencies in Forms Error-Message Handling
  • Summary

Error-message and exception handling are part and parcel of any quality software application, and Oracle Forms is no exception. This chapter provides the tricks of the trade for error- message handling in Forms programming and describes techniques required to augment the default Forms error-messaging capabilities.

Basically, the errors raised in Forms can be classified in the following broad categories:

  • Errors raised out of failure of Forms built-ins (FRM errors)
  • Errors raised out of failure of Forms object properties (also, FRM errors)
  • Errors raised out of exceptions from triggers and program unit code ”that is, failure of DML statements or PL/SQL errors
  • Errors raised on the server side and propagated to Forms as a failure of integrity constraints, insufficient privileges on base tables, and so on ( ORA-ERRORS )

All these types of errors can be tracked either by default Forms error-messaging capabilities or by augmenting these capabilities with customized code. I will discuss the various techniques to handle each of these types of errors, along with special cases involved.

GUI Development

Advanced GUI Development: Developing Beyond GUI

Multi-form Applications

Advanced Forms Programming

Error-Message Handling

Object-oriented Methods in Forms

Intelligence in Forms

Additional Interesting Techniques

Working with Trees

Oracle 8 and 8i Features in Forms Developer

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Oracle Developer Forms Techniques
Oracle Developer Forms Techniques
ISBN: 0672318466
EAN: 2147483647
Year: 2005
Pages: 115
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