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

Variable fields

Variable fields

A variable field defines calculations and stores data temporarily. You can use variable fields in the Expression and Aggregator transformations.
You might use variables to perform the following tasks:
  • Temporarily store data.
  • Simplify complex expressions.
  • Store values from prior rows.
  • Compare values.
For example, you want to generate a mailing list by concatenating first and last names, and then merging the name with the address data. To do this, you might create a variable field, FullName, that concatenates the First and Last fields. Then, you create an expression field, NameAddress, to concatenate the FullName variable field with the Address field.
The results of a variable field does not pass to the data flow. To use data from a variable field in the data flow, create an expression field for the variable field output. In the preceding example, to pass the concatenated first and last name to the data flow, create a FullName_out expression field. And then, use the FullName variable field as the expression for the field.

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