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

Aggregating values in an output field array

Aggregating values in an output field array

If the Hierarchy Processor transformation output contains an array, you might want to add an output field to aggregate values in the array. The output field must be a sibling of the array field.
For example, the Output group contains an array with orders information. The Orders array contains the OrderPrice field, which stores the price for each order. You want to find the total order price for each company.
The following image shows the output fields:
The image shows the Output Fields panel of the Hierarchy Processor tab of the Hierarchy Processor transformation. The Output Fields panel contains one output group with the following fields: CompanyName (string), Orders (array), and TotalOrderPrice (double). The Orders array struct contains the following fields: OrderPrice (double), OrderDate (string), Items (array), and OrderAddress (struct).
To find the total order price, add a field called TotalOrderPrice to the output group.
Edit the TotalOrderPrice field. Select
Use this field to aggregate values in an output field array
, and select the Orders array as the output field for which you want to aggregate values. Configure the following expression for the TotalOrderPrice field:
SUM(:fld.{Output.Orders.Orders.OrderPrice})

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