Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Access Policy transformation
  6. Aggregator transformation
  7. B2B 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 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 single occurring children

Add single occurring children

You can add single occurring children when adding incoming struct and array fields to the output and the output format is relational. The "Add single occurring children" option adds all single occurring children under the field to the output group, including the single occurring child fields that are nested under a struct.
When you select "Add single occurring children", the incoming field must have 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 of adding single occurring children

You want to extract customer information from the Customer array, with each output record containing information about one customer.
Select
Add
on the Customer array, with the
Add Single Occurring Children
option selected. This action adds all single occurring children under Customer, including the children under the FullAddress struct to the output group.
Note that you cannot add single occurring children at the Customers struct level, because there are no single occurring children under that top-level struct.
The following image shows the incoming and output fields:
The list of incoming fields on the left includes a top-level struct: Customers. Below that struct is an array: Customer. The Customer array contains five string fields and a struct: FullAddress. The struct FullAddress contains three string fields. The output group on the right, after applying Add Single Occurring Children, contains eight string fields.

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