Table of Contents

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  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

Calling an unconnected lookup from another transformation

Calling an unconnected lookup from another transformation

Supply input values for an unconnected Lookup transformation from a :LKP expression in another transformation such as an Expression transformation or Aggregator transformation. You can call the same lookup multiple times in one mapping. You cannot call an unconnected lookup from a Joiner or Java transformation.
Use the following syntax for a :LKP expression:
:LKP.<Lookup transformation name> (<argument>, <argument>, ...)
The arguments are local input fields that match the Lookup transformation input fields used in the lookup condition.
For example, the following expression passes the ITEM_ID and PRICE fields to an unconnected Lookup transformation named lkp_ItemPrices:
:LKP.lkp_ItemPrices (ITEM_ID, PRICE)
Use the following guidelines to write an expression that calls an unconnected Lookup transformation:
  • The order in which you list each argument must match the order of the lookup conditions in the Lookup transformation.
  • The datatypes for the fields in the expression must match the datatypes for the input fields in the Lookup transformation.
  • The argument fields in the expression must be in the same order as the input fields in the lookup condition.
  • If you call a connected Lookup transformation in a :LKP expression,
    Data Integration
    marks the mapping invalid.