Table of Contents

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  1. Preface
  2. Working with Transformations
  3. Aggregator Transformation
  4. Custom Transformation
  5. Custom Transformation Functions
  6. Data Masking Transformation
  7. Data Masking Examples
  8. Expression Transformation
  9. External Procedure Transformation
  10. Filter Transformation
  11. HTTP Transformation
  12. Identity Resolution Transformation
  13. Java Transformation
  14. Java Transformation API Reference
  15. Java Expressions
  16. Java Transformation Example
  17. Joiner Transformation
  18. Lookup Transformation
  19. Lookup Caches
  20. Dynamic Lookup Cache
  21. Normalizer Transformation
  22. Rank Transformation
  23. Router Transformation
  24. Sequence Generator Transformation
  25. Sorter Transformation
  26. Source Qualifier Transformation
  27. SQL Transformation
  28. Using the SQL Transformation in a Mapping
  29. Stored Procedure Transformation
  30. Transaction Control Transformation
  31. Union Transformation
  32. Unstructured Data Transformation
  33. Update Strategy Transformation
  34. XML Transformations

Transformation Guide

Transformation Guide

Expression Function Types

Expression Function Types

You can create expressions for a Java transformation
by using the
Expression Editor
, by writing the expression in the
Define Expression
dialog box,
or by using the simple or advanced interface.
You can enter expressions that use input or output port variables or variables in the Java code as input parameters.
If you use the
Define Expression
dialog box, you can use the
Expression Editor
to validate the expression before you use it in a Java transformation.
You can invoke the following types of expression functions in a Java transformation:
Expression Function Type
Description
Transformation language functions
SQL-like functions designed to handle common expressions.
User-defined functions
Functions that you create in
PowerCenter
based on transformation language functions.
Custom functions
Functions that you create with the Custom Function API.
You can also use unconnected transformations
,
built-in variables
, user-defined mapping and workflow variables, and pre-defined workflow variables
in expressions. For example, you can use an unconnected lookup transformation in an expression.

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