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 selected array as struct

Add selected array as struct

When you add an incoming array of primitives as a struct, the array is flattened into a struct field, without flattening any descendant arrays.
The "Add selected array as struct" option creates one record for each element in the selected array.

Example of adding an array as struct

You want to flatten an array of vehicle records into a struct without flattening the child array of maintenance records.
Add the vehicle array to the output group and choose
Add Selected Array as Struct
.
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 field: vehicle (struct). The vehicle struct 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 contains one record for each element in the vehicle array.
For example, the incoming data contains the following record which contains data about two vehicles:
[ { "vehicle": [ { "make": "Toyota", "model": "Corolla", "insurance": { "company": "Allstate", "policy_num": "AS12876" }, "maintenance": [ { "date": "01/01/2020", "description": ["oil filter1", "oil filter2"] }, { "date": "01/08/2020", "description": ["tire rotation1", "tire rotation2"] } ] }, { "make": "Toyota", "model": "RAV4", "insurance": { "company": "Allstate", "policy_num": "AS2033" }, "maintenance": [ { "date": "01/02/2020", "description": ["air filter replacement1", "air filter replacement2"] }, { "date": "01/08/2020", "description": ["battery replacement1", "battery replacement2"] } ] } ] } ]
The Hierarchy Processor transformation creates the following output records, one for each vehicle:
{ "vehicle":{ "make":"Toyota", "model":"Corolla", "insurance":{ "company":"Allstate", "policy_num":"AS12876" }, "maintenance":[ { "date":"01/08/2020", "description":["tire rotation2","tire rotation1"] }, { "date":"01/01/2020", "description":["oil filter2","oil filter1"] } ] } } { "vehicle":{ "make":"Toyota", "model":"RAV4", "insurance":{ "company":"Allstate", "policy_num":"AS2033" }, "maintenance":[ { "date":"01/08/2020", "description":["battery replacement2","battery replacement1"] }, { "date":"01/02/2020", "description":["air filter replacement2","air filter replacement1"] } ] } }

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