Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Aggregator transformation
  6. Cleanse transformation
  7. Data Masking transformation
  8. Data Services transformation
  9. Deduplicate transformation
  10. Expression transformation
  11. Filter transformation
  12. Hierarchy Builder transformation
  13. Hierarchy Parser transformation
  14. Hierarchy Processor transformation
  15. Input transformation
  16. Java transformation
  17. Java transformation API reference
  18. Joiner transformation
  19. Labeler transformation
  20. Lookup transformation
  21. Machine Learning transformation
  22. Mapplet transformation
  23. Normalizer transformation
  24. Output transformation
  25. Parse transformation
  26. Python transformation
  27. Rank transformation
  28. Router transformation
  29. Rule Specification transformation
  30. Sequence Generator transformation
  31. Sorter transformation
  32. SQL transformation
  33. Structure Parser transformation
  34. Transaction Control transformation
  35. Union transformation
  36. Velocity transformation
  37. Verifier transformation
  38. Web Services transformation

Transformations

Transformations

Configuring expressions

Configuring expressions

You can configure expressions when the output format is relational or hierarchical. For flattened output, the expression is fixed to the default format once you add the field and configuration is not possible.
To configure an expression in the Hierarchy Processor transformation, follow these steps:
  1. Perform one of the following actions to create the output fields:
    1. To use an incoming field as an output, click the
      Add
      link that appears when you hover over the incoming field.
    2. To create a new field, click
      New Field
      in the Output Fields panel near the output group name or near an array name.
  2. Click the expression in the Output Fields section.
    For newly created fields, the link appears as
    Configure
    . The
    Field Expression
    dialog box appears.
  3. Enter the expression in the expression editor. You can add incoming fields, functions, and variables to the expression by clicking the
    Add
    link next to the object that you want to use. You can also type in the expression manually.
    The expression can contain constants, variables, built-in functions, and user-defined functions. You can nest functions to create a complex expression.
    If you modify the references to any of the fields, your expression will fail.
  4. Click
    Validate
    .
  5. Correct any errors.
  6. Click
    OK
    .
    You can close the editor and troubleshoot an invalid expression at another time.

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