Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Access Policy transformation
  6. B2B transformation
  7. Aggregator transformation
  8. Cleanse transformation
  9. Data Masking transformation
  10. Data Services transformation
  11. Deduplicate transformation
  12. Expression transformation
  13. Filter transformation
  14. Hierarchy Builder transformation
  15. Hierarchy Parser transformation
  16. Hierarchy Processor transformation
  17. Input transformation
  18. Java transformation
  19. Java transformation API reference
  20. Joiner transformation
  21. Labeler transformation
  22. Lookup transformation
  23. Machine Learning transformation
  24. Mapplet transformation
  25. Normalizer transformation
  26. Output transformation
  27. Parse transformation
  28. Python transformation
  29. Rank transformation
  30. Router transformation
  31. Rule Specification transformation
  32. Sequence Generator transformation
  33. Sorter transformation
  34. SQL transformation
  35. Structure Parser transformation
  36. Transaction Control transformation
  37. Union transformation
  38. Velocity transformation
  39. Verifier transformation
  40. Web Services transformation

Transformations

Transformations

Add primitive single occurring children

Add primitive single occurring children

You can add primitive single occurring children when you are adding incoming struct and array fields to the output. The "Add primitive single occurring children" option is available when you add incoming struct or array fields to hierarchical output. It adds all primitive single occurring children under the field to the output group, including the primitive, single occurring child fields that are nested under a struct.
You can add primitive single occurring children only for incoming fields with child objects.
If the field you select contains an array, the array and its children are not added because an array can contain multiple elements.

Example

You want to extract the make, model, company, and policy number from an array of vehicle records. Each output record should contain information about one vehicle.
Add the vehicle array to the output group and choose
Add Primitive Single Occurring Children
.
The following image shows the incoming and output fields:
The image shows the Hierarchy Processor tab of the Hierarchy Processor transformation. The Incoming Fields panel contains one input group with the following field: vehicle (array). The vehicle array contains the following fields: make (string), model (string) insurance (struct), and maintenance (array). The insurance struct contains the following fields: company (string) and policy_num (string). The maintenance array contains the following fields: date (string) and description (array of strings). The Output Fields panel contains the following primitive fields: make (string), model (string), company (string), and policy_num (string).
Note that the date field is not added to the output group because it is under a child array of the selected field and is not single occurring.

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