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  • PowerCenter 10.4.1
  • All Products

Table of Contents

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  1. Preface
  2. Using the Designer
  3. Working with Sources
  4. Working with Flat Files
  5. Working with Targets
  6. Mappings
  7. Mapplets
  8. Mapping Parameters and Variables
  9. Working with User-Defined Functions
  10. Using the Debugger
  11. Viewing Data Lineage
  12. Comparing Objects
  13. Managing Business Components
  14. Creating Cubes and Dimensions
  15. Using the Mapping Wizards
  16. Datatype Reference
  17. Configure the Web Browser

Designer Guide

Designer Guide

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Configuring the Function Type

Configuring the Function Type

You can place user-defined functions in other user-defined functions. You can also configure a user-defined function to be callable from expressions. Callable means that you can place user-defined functions in an expression.
Select one of the following options when you configure a user-defined function:
  • Public.
     Callable from any user-defined function, transformation expression, link condition expression, or task expression.
  • Private.
     Callable from another user-defined function. Create a private function when you want the function to be part of a more complex function. The simple function may not be usable independently of the complex function.
After you create a public user-defined function, you cannot change the function type to private.
Although you can place a user-defined function in another user-defined function, a function cannot refer to itself. For example, the user-defined function RemoveSpaces includes a user-defined function TrimLeadingandTrailingSpaces. TrimLeadingandTrailingSpaces cannot include RemoveSpaces. Otherwise, RemoveSpaces is invalid.
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