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

Generating unique keys

Generating unique keys

In a mapping that converts hierarchical data to relational output, you can optionally generate unique keys for the hierarchical input group.
The following image shows the option to generate unique keys in the
Hierarchy Processor
tab:
The Hierarchy Processor tab of the Hierarchy Processor transformation contains an icon with three dots. The icon gives you the option to generate unique keys when the output data format is relational.
When you generate unique keys, you generate a primary key for the input group and a key for every array element within the input group. Each key is a combination of a global unique ID and a value that increases for each additional field. You can map the generated keys to the output groups just like any other incoming field.
When you map key fields from an input parent element to the output group of the child data set, the output data or output group has a primary key and foreign key relationship. This relationship is generated on the output side, based on how you mapped the generated keys.

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