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

Sequence Generator transformation rules and guidelines

Sequence Generator transformation rules and guidelines

Consider the following guidelines when you create a Sequence Generator transformation:
  • When you map the NEXTVAL or CURRVAL output fields, ensure that the data type of the mapped field is appropriate.
  • When you run the mapping in the Mapping Designer, the current value is not saved so each time you run the mapping, it begins with the initial value.
  • When you run the task in the
    mapping
    task wizard, you can edit the current value to start the sequence with a specified value.
  • You can't use a Sequence Generator transformation in a mapplet.
  • To use the Sequence Generator transformation in advanced mode, the Secure Agent must run on a virtual machine.
  • In advanced mode, generated values might not increase monotonically. Values are generated based on the order that the Spark engine processes the data.
  • A self-service cluster might intermittently fail to connect to the agent, which can cause the mapping to fail. Error messages related to this appear in the session logs.
  • In mappings in SQL ELT mode, you can't use shared sequences.
  • In mappings in SQL ELT mode, a Sequence Generator transformation needs to be connected directly to a downstream Expression transformation or target.

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