Table of Contents

Search

  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Aggregator transformation
  6. Cleanse transformation
  7. Data Masking transformation
  8. Deduplicate transformation
  9. Expression transformation
  10. Filter transformation
  11. Hierarchy Builder transformation
  12. Hierarchy Parser transformation
  13. Hierarchy Processor transformation
  14. Input transformation
  15. Java transformation
  16. Java transformation API reference
  17. Joiner transformation
  18. Labeler transformation
  19. Lookup transformation
  20. Mapplet transformation
  21. Normalizer transformation
  22. Output transformation
  23. Parse transformation
  24. Python transformation
  25. Rank transformation
  26. Router transformation
  27. Rule Specification transformation
  28. Sequence Generator transformation
  29. Sorter transformation
  30. SQL transformation
  31. Structure Parser transformation
  32. Transaction Control transformation
  33. Union transformation
  34. Velocity transformation
  35. Verifier transformation
  36. 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
Hierarchy Processor
tab with the option to generate unique keys:
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. The generated keys can be mapped to the output groups just like any other incoming field.
The result of mapping key fields from an input parent element to the output group of the child data set results in the output data or output groups having a primary key and foreign key relationship. The primary key and foreign key relationship is generated on the output side based on how the generated keys are mapped.